Water Filter Systems

Imperial Berkey® Water Filter 4.5  Gal

Starting $335
Everyone’s Favourite
Imperial Berkey Water Filter oos
Imperial Berkey™ Water Filter
Imperial Berkey Water Filter
Imperial Berkey Water Filter
Imperial Berkey™ Water Filter
Imperial Berkey Water Filter
Imperial Berkey Water Filter
Imperial Berkey™ Water Filter
Imperial Berkey Water Filter

Imperial Berkey® Water Filter

4.5  Gallons

{$ product.price $}

Quickly becoming one of the most popular systems, the Royal Berkey holds more water and filters it 14% faster than the Big!

  • Min. 2 Filters: 2-6 People
  • Max 4 Filters: 7 people
  • Flow Rate (Gallon Per Hour)
    2 filters : 4GPH
    4 filters : 8GPH
  • Dimensions: 9.5”D x 24”H
  • Empty weight: 8lbs

A great model for large families with large water consumption. Recommended for 6-10 people and includes 2 Black Berkey® Filters but can support up to 6 for quicker filtering. The Berkey Care Lifetime warranty is included with every new unit purchase, an exclusive benefit for Berkey Filters customers!


Recommended for 6-10+ People

Comes with 2 Filters

Maximum number of filters: 6

Max filtered water GPH: 16.5

Dimensions: 10"D x 27"H

Free Express Shipping Exclusive Lifetime Warranty 30-day Return

{"id":3245234520164,"title":"Imperial Berkey® Water Filter","handle":"imperial-berkey","description":"\u003cdiv class=\"c-pdp__container\"\u003e\n\u003cdiv class=\"product info detailed \"\u003e\n\u003cdiv class=\"product data items\"\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.description\" id=\"tab-label-product.info.description-title\"\u003e\n Details \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003c!-- Description --\u003e\n\u003cdiv class=\"c-pdp__info\" data-module_number=\"2\"\u003e\n\u003cdiv class=\"c-pdp__infoContainer o-grid\"\u003e\n\u003ch2 class=\"c-jumbo u-hideLargeUp js-acc c-pdpAcc is-active\"\u003eOverview\u003c\/h2\u003e\n\u003cdiv class=\"js-accTarger c-pdp__infoColWrapper\" style=\"display: block;\"\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoOne o-grid__large-3\"\u003e\n\u003ch2 class=\"c-display c-pdp__infoColTitle u-hideMobileLarge\"\u003eImperial Berkey® Water Filter System\u003c\/h2\u003e\n\u003cdiv class=\"c-pdp__infoCaps\"\u003e\n\u003cp\u003eHolding Capacity : 4.5 Gallons (17 L)\u003c\/p\u003e\n\u003cp\u003eMaterial: 304 Stainless Steel\u003c\/p\u003e\n\u003cp\u003eFinish: High Polish Stainless Steel\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoContent\"\u003e\n\u003cp\u003eUp until its introduction, Berkey had focused on water filters designed to meet the needs of families and small groups. Through multiple years of consumer feedback, we recognized the growing need for a water filter that could service larger groups like churches, schools, and orphanages. These unique customers had been purchasing multiple units like the Royal Berkey in order to meet the production output that was necessary to supply water to such large numbers of people. These smaller water filter systems posed several problems that made them less than ideal for their unique needs.\u003c\/p\u003e\n\u003cp\u003eOur first concern was that the upper container was not tall enough to produce the water pressure needed to push large enough amounts of water through the Black Berkey purification elements. Each foot of height produces approximately 0.5 pounds of water pressure that is used to push the water down through the filters. So the first design feature we implemented was to make the upper container of the Imperial Berkey taller. The second problem was the number of filters the unit could hold. Each purification element needs to have a certain amount of space around it in order to function properly.\u003c\/p\u003e\n\u003cp\u003eThe diameter of the smaller units was not large enough to accommodate more than four filters, so we increased the diameter of the lower storage container to accommodate up to six filter elements. The addition of the extra purification elements increased the water flow capacity to sixteen gallons per hour when the Imperial was full. The third obstacle was the water holding capacity of the lower container. So we increased the size of the lower container enough to hold ample water to meet the demands during these peak periods for large groups.\u003c\/p\u003e\n\u003cp\u003e*Not yet available in Iowa or California*\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoTwo o-grid__large-31NoGutter\"\u003e\n\u003cdiv class=\"c-pdp__infoMedia\" style=\"text-align: left;\"\u003e\n\u003cimg class=\"lazyload\" alt=\"Imperial Berkey Water Filter\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Imperial-Berkey-Water-Filter-Dims-Sub_3a7b0a05-c8ae-4296-9ede-dba1d3897e0c.png?22318\" style=\"float: none; margin-top: 80px;\"\u003e\u003cimg class=\"u-hideLargeUp lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdpinfo-mobile.png?15501\" alt=\"Berkey Filters\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoThree o-grid__large-3\"\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdp-product-small.png?15502\" alt=\"Berkey Filters\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eBlack Berkey® Filters\u003c\/h4\u003e\nThese purifying filters are installed in the upper chamber of the water filter system. The Imperial Berkey® supports up to 6 filters. \u003ca href=\"\/collections\/berkey-replacement-filters\/products\/black-berkey-filter\"\u003eLearn More\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" title=\"Berkey Fluoride Water Filter\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/fluoride-med.jpg\" alt=\"Berkey Fluoride Water Filter\" width=\"200\" height=\"200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eFluoride Filters (Add on)\u003c\/h4\u003e\n\u003cp\u003eThese white addon filters set in the lower chamber attached to the stems of the \u003ca title=\"Black Berkey purification elements\" href=\"\/collections\/berkey-replacement-filters\/products\/black-berkey-filter\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBlack Berkey purification elements\u003c\/a\u003e, reducing fluoride by up to 97%. \u003ca href=\"\/collections\/berkey-replacement-filters\/products\/berkey-fluoride-filter\"\u003eLearn More\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" title=\"Berkey Water Filter Spigot\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Black_Spigot_200x200.png\" alt=\"Berkey Water Filter Spigot\" width=\"200\" height=\"200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eSpigot (Included)\u003c\/h4\u003e\n\u003cp\u003eThe spigot, a valve for controlling the release of water, is made of FDA approved, BPA free polypropylene. Also available in \u003ca title=\"Berkey Stainless Steel Spigot\" href=\"\/products\/stainless-steel-spigot\" target=\"_self\"\u003estainless steel\u003c\/a\u003e.  \u003ca href=\"\/products\/stainless-steel-spigot\"\u003eLearn More\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.specs\" id=\"tab-label-product.info.specs-title\"\u003e\n Specs \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute specs\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"c-pdp__twoCol\" data-module_number=\"3\"\u003e\n\u003cdiv class=\"c-pdp__twoColContainer o-grid\"\u003e\n\u003cdiv class=\"c-pdpSpecs o-grid__large-60\"\u003e\n\u003ch2 class=\"c-jumbo c-pdp__twoColTitle js-acc c-pdpAcc c-pdpSpecsLAB\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"js-accTarger\"\u003e\n\u003cdiv class=\"c-pdpSpecs__block\"\u003e\n\u003cdiv class=\"c-pdpSpecs__media\"\u003e\n\u003ch3 class=\"c-pdpSpecs__mediaHead\"\u003eImperial Berkey® Water Filter System\u003c\/h3\u003e\n\u003cimg class=\"lazyload\" title=\"Imperial Berkey Hero\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Imperial_01.png\" alt=\"Hero Image for the Imperial Berkey\" width=\"500\" height=\"500\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__data\"\u003e\n\u003ctable class=\"c-pdpSpecs__table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltered Water Capacity\u003c\/td\u003e\n\u003ctd\u003e4.5 Gallons (17 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e10 x 10 x 27 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (Nested)\u003c\/td\u003e\n\u003ctd\u003e10 x 10 x 19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight Empty\u003c\/td\u003e\n\u003ctd\u003e10 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eWeight Full\u003c\/p\u003e\n\u003cp\u003e(Lower Chamber Full) \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e47.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh polish 304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpigot (Included) Material\u003c\/td\u003e\n\u003ctd\u003eBPA free, FDA approved, high impact \u003cspan\u003epolypropylene\u003c\/span\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice (USD)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e$335 with 2 Black Berkey® Filters (standard configuration)\u003c\/p\u003e\n\u003cp\u003e$445 with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003cp\u003e$555 with 6 Black Berkey® Filters\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePurification Speed \u003c\/p\u003e\n\u003cp\u003e(Gallons Per Hour)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUp to 5.5 GPH with 2 Black Berkey® Filters (standard configuration)\u003c\/p\u003e\n\u003cp\u003eUp to 11 GPH with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003cp\u003eUp to 16.5 GPH with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eAvailability \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eNot yet available in Iowa or California (\u003ca title=\"California and Berkey Filters\" href=\"\/pages\/berkey-water-filter-faq#shipping_restrictions\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eLearn Why\u003c\/a\u003e)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__block\"\u003e\n\u003cdiv class=\"c-pdpSpecs__media\"\u003e\n\u003ch3 class=\"c-pdpSpecs__mediaHead\"\u003eBlack Berkey® Purification Filters (2 included) \u003c\/h3\u003e\n\u003cimg class=\"lazyload\" title=\"Black Berkey Filter Elements\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdp-product-small.png?15502\" alt=\"Black Berkey Filters\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__data\"\u003e\n\u003ctable class=\"c-pdpSpecs__table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eContaminants Removed\u003c\/td\u003e\n\u003ctd\u003e203 contaminants are removed including, but not limited to; viruses (99.999%), pathogenic bacteria (99.9999%), Chloramine (below lab detectable limit), trihalomethanes (99.8%), pharmaceuticals (99.9%), pesticides (below lab detectable limit),heavy metals ( See full list of removed contaminants \u003ca title=\"What the Black Berkey Filters remove\" href=\"\/pages\/filtration-specifications\" target=\"_self\"\u003ehere\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.25 x 2.25 x 9.75 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCarbon composite containing high-grade coconut shell carbon combined with a proprietary blend of 5 other types of media.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eThe Black Berkey® purification element formulation has been tested by State and \u003cspan\u003eEPA accredited laboratories to exceed NSF\/ANSI Standard 53\u003csup\u003e1\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifespan\u003c\/td\u003e\n\u003ctd\u003e3,000 gallons per filter. (6,000 gallons per set of 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eTo read all the specification please \u003ca title=\"Black Berkey Filter\" href=\"\/pages\/filtration-specifications\" target=\"_self\"\u003e click here\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: xx-small;\"\u003e\u003csup\u003e1\u003c\/sup\u003eThe Black Berkey purification element formulation has been tested by State \u003cspan id=\"cke_bm_166S\"\u003e \u003c\/span\u003eand EPA accredited laboratories to exceed NSF\/ANSI Standard 53 but has not yet been certified.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpLab o-grid__large-40\"\u003e\n\u003ch2 class=\"c-jumbo c-pdp__twoColTitle js-acc c-pdpAcc c-pdpSpecsLAB\"\u003eLab Results\u003c\/h2\u003e\n\u003cdiv class=\"c-pdpLab__pdf js-accTarger\" style=\"display: block;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Black-Berkey_Perfluorinated-Chemical-Removal-Test-Report.pdf?11366\"\u003eBlack-Berkey_Perfluorinated-Chemical-Removal-Test-Report.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Berkey_Purification_Element_Chem-Red_Test-9-15_Rev.pdf?11366\"\u003eBerkey Purification Element Chem-Red Test-9-15 Rev.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Gross_Alpha_Radiological_Test_Results-1.pdf?11366\"\u003eBF2 Gross Alpha Radiological Test Results-1.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Gross_Beta_Radiological_Test_Results.pdf?11366\"\u003eBF2 Gross Beta Radiological Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Inorganic_Test_Results.pdf?11366\"\u003eBF2 Inorganic Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Microbiological_Testing.pdf?11366\"\u003eBF2 Microbiological Testing.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Organic_Test_Results.pdf?11366\"\u003eBF2 Organic Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Uranium_Radiological_Test_Results.pdf?11366\"\u003eBF2 Uranium Radiological Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpLab__inst\"\u003e\n\u003ch3 class=\"c-pdpLab__instTitle\"\u003eHow To Information\u003c\/h3\u003e\n\u003cdiv class=\"c-pdpLab__instBtn\"\u003e\u003ca class=\"c-btn c-btnMed\" href=\"\/pages\/berkey-answers\"\u003eView\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.videos\" id=\"tab-label-product.info.videos-title\"\u003e\n Video \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute videos\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003c!-- Compare --\u003e\n\u003cdiv class=\"c-pdp__compare\" data-module_number=\"4\"\u003e\n\u003cdiv class=\"c-pdp__compareContainer o-grid\"\u003e\n\u003ch2 class=\"c-pdp__compareTitle c-jumbo\"\u003eCompare the Berkey®\u003cbr\u003e Water Filter systems\u003c\/h2\u003e\n\u003cdiv class=\"c-pdp__compareBlock c-compare\"\u003e\n\u003cdiv class=\"c-pdp__compareScroll js-tableScroll u-hideMediumUp\"\u003e\n\u003cspan class=\"c-pdp__compareScrollLeft js-tableScrollRight\"\u003e\u003c\/span\u003e \u003cspan class=\"c-pdp__compareScrollRight js-tableScrollLeft\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ctable class=\"c-pdpCompare\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth class=\"active-mobile\"\u003e\n\u003cspan\u003e4.5\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-5.png\" alt=\"\"\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e1.50\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/travel-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-6.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e2.25\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/products\/big-berkey\"\u003e\u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/big-berkey-filters0.png\" alt=\"\"\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e2.75\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/berkey-light\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-4.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e3.25\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/royal-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-3.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth class=\"active-desktop\"\u003e\n\u003cspan\u003e4.50\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/imperial-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-2.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e6.00\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/crown-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-1.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth class=\"active-mobile\"\u003e\n\u003cspan\u003eImperial Berkey®\u003c\/span\u003e\u003cbr\u003e10\"D x 27\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eTravel Berkey®\u003c\/span\u003e\u003cbr\u003e7.5\"D x 19\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eBig Berkey®\u003c\/span\u003e\u003cbr\u003e8.5\"D x 21\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eBerkey Light®\u003c\/span\u003e\u003cbr\u003e9\"D x 28”H \u003cbr\u003e(with 6” stand)\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eRoyal Berkey®\u003c\/span\u003e\u003cbr\u003e9.5\"D x 24\"H\u003c\/th\u003e\n\u003cth class=\"active-desktop\"\u003e\n\u003cspan\u003eImperial Berkey®\u003c\/span\u003e\u003cbr\u003e10\"D x 27\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eCrown Berkey®\u003c\/span\u003e\u003cbr\u003e11\"D x 31\"H\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003csup\u003e1\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e$335 - $445\u003c\/td\u003e\n\u003ctd\u003e$249\u003c\/td\u003e\n\u003ctd\u003e$278 - $388\u003c\/td\u003e\n\u003ctd\u003e$243 - $353\u003c\/td\u003e\n\u003ctd\u003e$305 - $415\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e$335 - $445\u003c\/td\u003e\n\u003ctd\u003e$360 - $690\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeople\u003c\/p\u003e\n\u003cp\u003e(\u003ca title=\"Selecting the right size of Berkey\" href=\"\/pages\/selecting-a-berkey-water-filter-model\"\u003eSee how we calculate\u003c\/a\u003e)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e6-10+\u003c\/td\u003e\n\u003ctd\u003e1-2\u003c\/td\u003e\n\u003ctd\u003e2-4\u003c\/td\u003e\n\u003ctd\u003e2-6\u003c\/td\u003e\n\u003ctd\u003e4-6\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e6-10+\u003c\/td\u003e\n\u003ctd\u003e8-12+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded No. of Filters\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum no. of Filters\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e6\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e6\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax gallons per hour of filtered water\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e21.5\u003c\/td\u003e\n\u003ctd\u003e2.75\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e21.5\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__compareContainer o-grid\"\u003e\n\u003cp class=\"c-pdp__compareTag\"\u003e\u003csup\u003e1\u003c\/sup\u003ePrice varies with the number of Filters \u003cspan\u003e|\u003c\/span\u003e \u003csup\u003e2\u003c\/sup\u003eFlow rate based on optimal water conditions and emergency use with the upper container being kept full. Flow rate may vary by user.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","published_at":"2019-04-04T10:31:31-06:00","created_at":"2019-04-04T10:32:04-06:00","vendor":"Berkey","type":"Water Filter","tags":["berkeley","Berkley","berky","Burkely","Burkey","nocal","OOS"],"price":33500,"price_min":33500,"price_max":67900,"available":true,"price_varies":true,"compare_at_price":33500,"compare_at_price_min":33500,"compare_at_price_max":69800,"compare_at_price_varies":true,"variants":[{"id":26359935598692,"title":"2 Filters \/ No","option1":"2 Filters","option2":"No","option3":null,"sku":"IU2","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 2 Filters \/ No","public_title":"2 Filters \/ No","options":["2 Filters","No"],"price":33500,"weight":5443,"compare_at_price":33500,"inventory_management":"shopify","barcode":""},{"id":26669125828708,"title":"2 Filters \/ 2 Filters","option1":"2 Filters","option2":"2 Filters","option3":null,"sku":"IU2-PK","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 2 Filters \/ 2 Filters","public_title":"2 Filters \/ 2 Filters","options":["2 Filters","2 Filters"],"price":36900,"weight":6350,"compare_at_price":37500,"inventory_management":"shopify","barcode":""},{"id":26669125927012,"title":"4 Filters \/ No","option1":"4 Filters","option2":"No","option3":null,"sku":"IU4","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 4 Filters \/ No","public_title":"4 Filters \/ No","options":["4 Filters","No"],"price":44500,"weight":6804,"compare_at_price":44500,"inventory_management":"shopify","barcode":""},{"id":26669125992548,"title":"4 Filters \/ 4 Filters","option1":"4 Filters","option2":"4 Filters","option3":null,"sku":"IU4-PK","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 4 Filters \/ 4 Filters","public_title":"4 Filters \/ 4 Filters","options":["4 Filters","4 Filters"],"price":52500,"weight":8165,"compare_at_price":53600,"inventory_management":"shopify","barcode":""},{"id":26669126058084,"title":"6 Filters \/ No","option1":"6 Filters","option2":"No","option3":null,"sku":"IU6","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 6 Filters \/ No","public_title":"6 Filters \/ No","options":["6 Filters","No"],"price":55500,"weight":8165,"compare_at_price":55500,"inventory_management":"shopify","barcode":""},{"id":26669126156388,"title":"6 Filters \/ 6 Filters","option1":"6 Filters","option2":"6 Filters","option3":null,"sku":"IU6-PK","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Imperial Berkey® Water Filter - 6 Filters \/ 6 Filters","public_title":"6 Filters \/ 6 Filters","options":["6 Filters","6 Filters"],"price":67900,"weight":10886,"compare_at_price":69800,"inventory_management":"shopify","barcode":""}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/products\/imperial-berkey-water-filter_92bf7990-0d91-4cf0-92d6-8db1d263e5f1.png?v=1567102542","\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/products\/big_berkey_cut_sub.png?v=1573154884","\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/products\/Imperial-Berkey.png?v=1573154936","\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/products\/Imperial-Berkey-Sold-Out.png?v=1573154884"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/products\/imperial-berkey-water-filter_92bf7990-0d91-4cf0-92d6-8db1d263e5f1.png?v=1567102542","options":["Filters","Fluoride Filters"],"content":"\u003cdiv class=\"c-pdp__container\"\u003e\n\u003cdiv class=\"product info detailed \"\u003e\n\u003cdiv class=\"product data items\"\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.description\" id=\"tab-label-product.info.description-title\"\u003e\n Details \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003c!-- Description --\u003e\n\u003cdiv class=\"c-pdp__info\" data-module_number=\"2\"\u003e\n\u003cdiv class=\"c-pdp__infoContainer o-grid\"\u003e\n\u003ch2 class=\"c-jumbo u-hideLargeUp js-acc c-pdpAcc is-active\"\u003eOverview\u003c\/h2\u003e\n\u003cdiv class=\"js-accTarger c-pdp__infoColWrapper\" style=\"display: block;\"\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoOne o-grid__large-3\"\u003e\n\u003ch2 class=\"c-display c-pdp__infoColTitle u-hideMobileLarge\"\u003eImperial Berkey® Water Filter System\u003c\/h2\u003e\n\u003cdiv class=\"c-pdp__infoCaps\"\u003e\n\u003cp\u003eHolding Capacity : 4.5 Gallons (17 L)\u003c\/p\u003e\n\u003cp\u003eMaterial: 304 Stainless Steel\u003c\/p\u003e\n\u003cp\u003eFinish: High Polish Stainless Steel\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoContent\"\u003e\n\u003cp\u003eUp until its introduction, Berkey had focused on water filters designed to meet the needs of families and small groups. Through multiple years of consumer feedback, we recognized the growing need for a water filter that could service larger groups like churches, schools, and orphanages. These unique customers had been purchasing multiple units like the Royal Berkey in order to meet the production output that was necessary to supply water to such large numbers of people. These smaller water filter systems posed several problems that made them less than ideal for their unique needs.\u003c\/p\u003e\n\u003cp\u003eOur first concern was that the upper container was not tall enough to produce the water pressure needed to push large enough amounts of water through the Black Berkey purification elements. Each foot of height produces approximately 0.5 pounds of water pressure that is used to push the water down through the filters. So the first design feature we implemented was to make the upper container of the Imperial Berkey taller. The second problem was the number of filters the unit could hold. Each purification element needs to have a certain amount of space around it in order to function properly.\u003c\/p\u003e\n\u003cp\u003eThe diameter of the smaller units was not large enough to accommodate more than four filters, so we increased the diameter of the lower storage container to accommodate up to six filter elements. The addition of the extra purification elements increased the water flow capacity to sixteen gallons per hour when the Imperial was full. The third obstacle was the water holding capacity of the lower container. So we increased the size of the lower container enough to hold ample water to meet the demands during these peak periods for large groups.\u003c\/p\u003e\n\u003cp\u003e*Not yet available in Iowa or California*\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoTwo o-grid__large-31NoGutter\"\u003e\n\u003cdiv class=\"c-pdp__infoMedia\" style=\"text-align: left;\"\u003e\n\u003cimg class=\"lazyload\" alt=\"Imperial Berkey Water Filter\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Imperial-Berkey-Water-Filter-Dims-Sub_3a7b0a05-c8ae-4296-9ede-dba1d3897e0c.png?22318\" style=\"float: none; margin-top: 80px;\"\u003e\u003cimg class=\"u-hideLargeUp lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdpinfo-mobile.png?15501\" alt=\"Berkey Filters\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__infoCol c-pdp__infoThree o-grid__large-3\"\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdp-product-small.png?15502\" alt=\"Berkey Filters\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eBlack Berkey® Filters\u003c\/h4\u003e\nThese purifying filters are installed in the upper chamber of the water filter system. The Imperial Berkey® supports up to 6 filters. \u003ca href=\"\/collections\/berkey-replacement-filters\/products\/black-berkey-filter\"\u003eLearn More\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" title=\"Berkey Fluoride Water Filter\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/fluoride-med.jpg\" alt=\"Berkey Fluoride Water Filter\" width=\"200\" height=\"200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eFluoride Filters (Add on)\u003c\/h4\u003e\n\u003cp\u003eThese white addon filters set in the lower chamber attached to the stems of the \u003ca title=\"Black Berkey purification elements\" href=\"\/collections\/berkey-replacement-filters\/products\/black-berkey-filter\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBlack Berkey purification elements\u003c\/a\u003e, reducing fluoride by up to 97%. \u003ca href=\"\/collections\/berkey-replacement-filters\/products\/berkey-fluoride-filter\"\u003eLearn More\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo\"\u003e\n\u003cdiv class=\"c-pdpInfo__img\"\u003e\u003cimg class=\"lazyload\" title=\"Berkey Water Filter Spigot\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Black_Spigot_200x200.png\" alt=\"Berkey Water Filter Spigot\" width=\"200\" height=\"200\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdpInfo__content\"\u003e\n\u003ch4 class=\"c-pdpInfo__title\"\u003eSpigot (Included)\u003c\/h4\u003e\n\u003cp\u003eThe spigot, a valve for controlling the release of water, is made of FDA approved, BPA free polypropylene. Also available in \u003ca title=\"Berkey Stainless Steel Spigot\" href=\"\/products\/stainless-steel-spigot\" target=\"_self\"\u003estainless steel\u003c\/a\u003e.  \u003ca href=\"\/products\/stainless-steel-spigot\"\u003eLearn More\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.specs\" id=\"tab-label-product.info.specs-title\"\u003e\n Specs \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute specs\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"c-pdp__twoCol\" data-module_number=\"3\"\u003e\n\u003cdiv class=\"c-pdp__twoColContainer o-grid\"\u003e\n\u003cdiv class=\"c-pdpSpecs o-grid__large-60\"\u003e\n\u003ch2 class=\"c-jumbo c-pdp__twoColTitle js-acc c-pdpAcc c-pdpSpecsLAB\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"js-accTarger\"\u003e\n\u003cdiv class=\"c-pdpSpecs__block\"\u003e\n\u003cdiv class=\"c-pdpSpecs__media\"\u003e\n\u003ch3 class=\"c-pdpSpecs__mediaHead\"\u003eImperial Berkey® Water Filter System\u003c\/h3\u003e\n\u003cimg class=\"lazyload\" title=\"Imperial Berkey Hero\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Imperial_01.png\" alt=\"Hero Image for the Imperial Berkey\" width=\"500\" height=\"500\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__data\"\u003e\n\u003ctable class=\"c-pdpSpecs__table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltered Water Capacity\u003c\/td\u003e\n\u003ctd\u003e4.5 Gallons (17 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e10 x 10 x 27 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (Nested)\u003c\/td\u003e\n\u003ctd\u003e10 x 10 x 19 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight Empty\u003c\/td\u003e\n\u003ctd\u003e10 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eWeight Full\u003c\/p\u003e\n\u003cp\u003e(Lower Chamber Full) \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e47.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh polish 304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpigot (Included) Material\u003c\/td\u003e\n\u003ctd\u003eBPA free, FDA approved, high impact \u003cspan\u003epolypropylene\u003c\/span\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice (USD)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e$335 with 2 Black Berkey® Filters (standard configuration)\u003c\/p\u003e\n\u003cp\u003e$445 with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003cp\u003e$555 with 6 Black Berkey® Filters\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePurification Speed \u003c\/p\u003e\n\u003cp\u003e(Gallons Per Hour)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUp to 5.5 GPH with 2 Black Berkey® Filters (standard configuration)\u003c\/p\u003e\n\u003cp\u003eUp to 11 GPH with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003cp\u003eUp to 16.5 GPH with 4 Black Berkey® Filters\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eAvailability \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eNot yet available in Iowa or California (\u003ca title=\"California and Berkey Filters\" href=\"\/pages\/berkey-water-filter-faq#shipping_restrictions\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eLearn Why\u003c\/a\u003e)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__block\"\u003e\n\u003cdiv class=\"c-pdpSpecs__media\"\u003e\n\u003ch3 class=\"c-pdpSpecs__mediaHead\"\u003eBlack Berkey® Purification Filters (2 included) \u003c\/h3\u003e\n\u003cimg class=\"lazyload\" title=\"Black Berkey Filter Elements\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/pdp-product-small.png?15502\" alt=\"Black Berkey Filters\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpSpecs__data\"\u003e\n\u003ctable class=\"c-pdpSpecs__table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eContaminants Removed\u003c\/td\u003e\n\u003ctd\u003e203 contaminants are removed including, but not limited to; viruses (99.999%), pathogenic bacteria (99.9999%), Chloramine (below lab detectable limit), trihalomethanes (99.8%), pharmaceuticals (99.9%), pesticides (below lab detectable limit),heavy metals ( See full list of removed contaminants \u003ca title=\"What the Black Berkey Filters remove\" href=\"\/pages\/filtration-specifications\" target=\"_self\"\u003ehere\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.25 x 2.25 x 9.75 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComposition\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCarbon composite containing high-grade coconut shell carbon combined with a proprietary blend of 5 other types of media.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eThe Black Berkey® purification element formulation has been tested by State and \u003cspan\u003eEPA accredited laboratories to exceed NSF\/ANSI Standard 53\u003csup\u003e1\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifespan\u003c\/td\u003e\n\u003ctd\u003e3,000 gallons per filter. (6,000 gallons per set of 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eTo read all the specification please \u003ca title=\"Black Berkey Filter\" href=\"\/pages\/filtration-specifications\" target=\"_self\"\u003e click here\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: xx-small;\"\u003e\u003csup\u003e1\u003c\/sup\u003eThe Black Berkey purification element formulation has been tested by State \u003cspan id=\"cke_bm_166S\"\u003e \u003c\/span\u003eand EPA accredited laboratories to exceed NSF\/ANSI Standard 53 but has not yet been certified.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpLab o-grid__large-40\"\u003e\n\u003ch2 class=\"c-jumbo c-pdp__twoColTitle js-acc c-pdpAcc c-pdpSpecsLAB\"\u003eLab Results\u003c\/h2\u003e\n\u003cdiv class=\"c-pdpLab__pdf js-accTarger\" style=\"display: block;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Black-Berkey_Perfluorinated-Chemical-Removal-Test-Report.pdf?11366\"\u003eBlack-Berkey_Perfluorinated-Chemical-Removal-Test-Report.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/Berkey_Purification_Element_Chem-Red_Test-9-15_Rev.pdf?11366\"\u003eBerkey Purification Element Chem-Red Test-9-15 Rev.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Gross_Alpha_Radiological_Test_Results-1.pdf?11366\"\u003eBF2 Gross Alpha Radiological Test Results-1.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Gross_Beta_Radiological_Test_Results.pdf?11366\"\u003eBF2 Gross Beta Radiological Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Inorganic_Test_Results.pdf?11366\"\u003eBF2 Inorganic Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Microbiological_Testing.pdf?11366\"\u003eBF2 Microbiological Testing.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Organic_Test_Results.pdf?11366\"\u003eBF2 Organic Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/BF2_Uranium_Radiological_Test_Results.pdf?11366\"\u003eBF2 Uranium Radiological Test Results.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdpLab__inst\"\u003e\n\u003ch3 class=\"c-pdpLab__instTitle\"\u003eHow To Information\u003c\/h3\u003e\n\u003cdiv class=\"c-pdpLab__instBtn\"\u003e\u003ca class=\"c-btn c-btnMed\" href=\"\/pages\/berkey-answers\"\u003eView\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__item\"\u003e\u003c!--\u003ca class=\"data switch\" tabindex=\"-1\" data-toggle=\"switch\" href=\"#product.info.videos\" id=\"tab-label-product.info.videos-title\"\u003e\n Video \u003c\/a\u003e--\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__content\" id=\"\" data-role=\"content\"\u003e\n\u003cdiv class=\"product attribute videos\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003c!-- Compare --\u003e\n\u003cdiv class=\"c-pdp__compare\" data-module_number=\"4\"\u003e\n\u003cdiv class=\"c-pdp__compareContainer o-grid\"\u003e\n\u003ch2 class=\"c-pdp__compareTitle c-jumbo\"\u003eCompare the Berkey®\u003cbr\u003e Water Filter systems\u003c\/h2\u003e\n\u003cdiv class=\"c-pdp__compareBlock c-compare\"\u003e\n\u003cdiv class=\"c-pdp__compareScroll js-tableScroll u-hideMediumUp\"\u003e\n\u003cspan class=\"c-pdp__compareScrollLeft js-tableScrollRight\"\u003e\u003c\/span\u003e \u003cspan class=\"c-pdp__compareScrollRight js-tableScrollLeft\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ctable class=\"c-pdpCompare\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth class=\"active-mobile\"\u003e\n\u003cspan\u003e4.5\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-5.png\" alt=\"\"\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e1.50\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/travel-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-6.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e2.25\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/products\/big-berkey\"\u003e\u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/big-berkey-filters0.png\" alt=\"\"\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e2.75\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/berkey-light\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-4.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e3.25\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/royal-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-3.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth class=\"active-desktop\"\u003e\n\u003cspan\u003e4.50\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/imperial-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-2.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003e6.00\u003cspan\u003e\u003cbr\u003eGallons\u003c\/span\u003e\u003c\/span\u003e \u003ca href=\"\/products\/crown-berkey\"\u003e \u003cimg class=\"lazyload\" data-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0167\/5480\/2788\/files\/table-filter-1.png\" alt=\"\"\u003e \u003c\/a\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth class=\"active-mobile\"\u003e\n\u003cspan\u003eImperial Berkey®\u003c\/span\u003e\u003cbr\u003e10\"D x 27\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eTravel Berkey®\u003c\/span\u003e\u003cbr\u003e7.5\"D x 19\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eBig Berkey®\u003c\/span\u003e\u003cbr\u003e8.5\"D x 21\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eBerkey Light®\u003c\/span\u003e\u003cbr\u003e9\"D x 28”H \u003cbr\u003e(with 6” stand)\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eRoyal Berkey®\u003c\/span\u003e\u003cbr\u003e9.5\"D x 24\"H\u003c\/th\u003e\n\u003cth class=\"active-desktop\"\u003e\n\u003cspan\u003eImperial Berkey®\u003c\/span\u003e\u003cbr\u003e10\"D x 27\"H\u003c\/th\u003e\n\u003cth\u003e\n\u003cspan\u003eCrown Berkey®\u003c\/span\u003e\u003cbr\u003e11\"D x 31\"H\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003csup\u003e1\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e$335 - $445\u003c\/td\u003e\n\u003ctd\u003e$249\u003c\/td\u003e\n\u003ctd\u003e$278 - $388\u003c\/td\u003e\n\u003ctd\u003e$243 - $353\u003c\/td\u003e\n\u003ctd\u003e$305 - $415\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e$335 - $445\u003c\/td\u003e\n\u003ctd\u003e$360 - $690\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeople\u003c\/p\u003e\n\u003cp\u003e(\u003ca title=\"Selecting the right size of Berkey\" href=\"\/pages\/selecting-a-berkey-water-filter-model\"\u003eSee how we calculate\u003c\/a\u003e)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e6-10+\u003c\/td\u003e\n\u003ctd\u003e1-2\u003c\/td\u003e\n\u003ctd\u003e2-4\u003c\/td\u003e\n\u003ctd\u003e2-6\u003c\/td\u003e\n\u003ctd\u003e4-6\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e6-10+\u003c\/td\u003e\n\u003ctd\u003e8-12+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded No. of Filters\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum no. of Filters\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e6\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e6\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax gallons per hour of filtered water\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003ctd class=\"active-mobile\"\u003e21.5\u003c\/td\u003e\n\u003ctd\u003e2.75\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd class=\"active-desktop\"\u003e21.5\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-pdp__compareContainer o-grid\"\u003e\n\u003cp class=\"c-pdp__compareTag\"\u003e\u003csup\u003e1\u003c\/sup\u003ePrice varies with the number of Filters \u003cspan\u003e|\u003c\/span\u003e \u003csup\u003e2\u003c\/sup\u003eFlow rate based on optimal water conditions and emergency use with the upper container being kept full. Flow rate may vary by user.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e"}

Overview

Imperial Berkey® Water Filter System

Holding Capacity : 4.5 Gallons (17 L)

Material: 304 Stainless Steel

Finish: High Polish Stainless Steel

Up until its introduction, Berkey had focused on water filters designed to meet the needs of families and small groups. Through multiple years of consumer feedback, we recognized the growing need for a water filter that could service larger groups like churches, schools, and orphanages. These unique customers had been purchasing multiple units like the Royal Berkey in order to meet the production output that was necessary to supply water to such large numbers of people. These smaller water filter systems posed several problems that made them less than ideal for their unique needs.

Our first concern was that the upper container was not tall enough to produce the water pressure needed to push large enough amounts of water through the Black Berkey purification elements. Each foot of height produces approximately 0.5 pounds of water pressure that is used to push the water down through the filters. So the first design feature we implemented was to make the upper container of the Imperial Berkey taller. The second problem was the number of filters the unit could hold. Each purification element needs to have a certain amount of space around it in order to function properly.

The diameter of the smaller units was not large enough to accommodate more than four filters, so we increased the diameter of the lower storage container to accommodate up to six filter elements. The addition of the extra purification elements increased the water flow capacity to sixteen gallons per hour when the Imperial was full. The third obstacle was the water holding capacity of the lower container. So we increased the size of the lower container enough to hold ample water to meet the demands during these peak periods for large groups.

*Not yet available in Iowa or California*

Imperial Berkey Water FilterBerkey Filters
Berkey Filters

Black Berkey® Filters

These purifying filters are installed in the upper chamber of the water filter system. The Imperial Berkey® supports up to 6 filters. Learn More
Berkey Fluoride Water Filter

Fluoride Filters (Add on)

These white addon filters set in the lower chamber attached to the stems of the Black Berkey purification elements, reducing fluoride by up to 97%. Learn More

Berkey Water Filter Spigot

Spigot (Included)

The spigot, a valve for controlling the release of water, is made of FDA approved, BPA free polypropylene. Also available in stainless steel.  Learn More

Specifications

Imperial Berkey® Water Filter System

Hero Image for the Imperial Berkey
Filtered Water Capacity 4.5 Gallons (17 L)
Product Dimensions 10 x 10 x 27 inches
Product Dimensions (Nested) 10 x 10 x 19 inches
Weight Empty 10 lbs

Weight Full

(Lower Chamber Full) 

 47.5 lbs
Material High polish 304 stainless steel
Spigot (Included) Material BPA free, FDA approved, high impact polypropylene 
Price (USD)

$335 with 2 Black Berkey® Filters (standard configuration)

$445 with 4 Black Berkey® Filters

$555 with 6 Black Berkey® Filters

Purification Speed 

(Gallons Per Hour)

Up to 5.5 GPH with 2 Black Berkey® Filters (standard configuration)

Up to 11 GPH with 4 Black Berkey® Filters

Up to 16.5 GPH with 4 Black Berkey® Filters

Availability 

Not yet available in Iowa or California (Learn Why)

Black Berkey® Purification Filters (2 included) 

Black Berkey Filters
Contaminants Removed 203 contaminants are removed including, but not limited to; viruses (99.999%), pathogenic bacteria (99.9999%), Chloramine (below lab detectable limit), trihalomethanes (99.8%), pharmaceuticals (99.9%), pesticides (below lab detectable limit),heavy metals ( See full list of removed contaminants here)
Product Dimensions 2.25 x 2.25 x 9.75 inches
Composition Carbon composite containing high-grade coconut shell carbon combined with a proprietary blend of 5 other types of media.
Certifications The Black Berkey® purification element formulation has been tested by State and EPA accredited laboratories to exceed NSF/ANSI Standard 531
Lifespan 3,000 gallons per filter. (6,000 gallons per set of 2)

To read all the specification please click here

1The Black Berkey purification element formulation has been tested by State  and EPA accredited laboratories to exceed NSF/ANSI Standard 53 but has not yet been certified.

Lab Results

How To Information

View

Compare the Berkey®
Water Filter systems

4.5
Gallons 		1.50
Gallons 		2.25
Gallons 		2.75
Gallons 		3.25
Gallons 		4.50
Gallons 		6.00
Gallons
Imperial Berkey®
10"D x 27"H		 Travel Berkey®
7.5"D x 19"H		 Big Berkey®
8.5"D x 21"H		 Berkey Light®
9"D x 28”H
(with 6” stand)		 Royal Berkey®
9.5"D x 24"H		 Imperial Berkey®
10"D x 27"H		 Crown Berkey®
11"D x 31"H
Price1 $335 - $445 $249 $278 - $388 $243 - $353 $305 - $415 $335 - $445 $360 - $690

People

(See how we calculate)

 6-10+ 1-2 2-4 2-6 4-6 6-10+ 8-12+
Included No. of Filters 2 2 2 2 2 2 2
Maximum no. of Filters 6 2 4 4 4 6 8
Max gallons per hour of filtered water2 21.5 2.75 7 7.5 8 21.5 26

1Price varies with the number of Filters | 2Flow rate based on optimal water conditions and emergency use with the upper container being kept full. Flow rate may vary by user.