Berkey vs. Alexapure Water Filters

It can be difficult to find the right water system for your home when there are various options in the marketplace. That’s why we compare the Berkey water filter system with the competition so you can decide what’s the best filtered water system out there.

For this comparison, we will look at the Big Berkey Water Filter with the most comparable model from Alexapure Water Filters, the Alexapure Pro.

Berkey vs Alexapure water filters

How Big Berkey Works

The Big Berkey filter system is a gravity led water system that works for indoor use, outdoor use and emergency situations. It removes over 200 contaminants including chromium VI, heavy metals, coliform, chloramine, glyphosate and other materials while preventing bacteria growth and keeping the beneficial minerals in the water. Berkey systems are made of polished stainless steel for quality and style. Berkey systems can be used by as little as one person to as many as six people or more and it takes approximately one hour to filter one gallon of water.

The Berkey operates by pouring water in the top chamber and the weight of the water  and gravity push it through the Black Berkey Purification Elements. These purification elements are composed of more than six different medias. Their pores are so small that contaminants and impurities cannot pass through the filter. The media formulation has adsorption and adsorbtion properties. This allows the tiny pores to block water contaminants that are smaller than the pore itself. Heavy metal ions are removed through an ion exchange process. Here they are attracted and transformed by electrically bonding to the media. 

Our Black Berkey purification element exceeds NSF/ANSI 53 standard tested by state and EPA accredited laboratories and is composed of granular activated carbon. Each Berkey system purchased from Berkey Filters comes with a Berkey Care lifetime warranty.

How Alexapure Pro Works

The Alexapure Pro water filtration system is a gravity led water system that targets over 200 contaminants including heavy metals and chlorine. Alexapure works in a similar way to the Berkey Water Systems, although they only have one filter that lasts for 1000 gallons less than the pair of Black Berkey Filters. Made with a stainless steel design, the Alexapure Pro is also tested to NSF/ANSI Standards. The Alexapure Pro offers a 30-day return warranty for unopened products and a one-year warranty for damaged products.

Rob Greenfield with Berkey


At first glance, the Alexapure Pro is slightly cheaper than the Big Berkey, but it has drawbacks. After the first initial system cost that includes filters, the Alexapure Pro becomes more expensive than the Big Berkey because the filter lifespan is 1000 gallons shorter than the Big Berkey. At three gallons a day, your Big Berkey filter would last around a year longer than Alexapure Pro filters and over a longer period of time, that continues to add up.

When breaking down the cost of the systems over 6000 gallons, the life expectancy of the Black Berkey Purification Elements, the savings start to add up. When using three gallons of water per day, at the cost of $278, the Big Berkey comes out to being 4.6¢ per gallons. The cost of the Alexapure pro is $249.95 and lasts for 5000 gallons, so you will need to purchase an additional filter for $199.95. This brings the cost to $369.90 and when using three gallons per day equates to 6.1¢ per gallon.


On top of cost, the Big Berkey also reigns superior on performance. The Berkey Systems removes over 200 contaminants all the while leaving beneficial minerals in the water. The filtration of the Alexapure filters itself isn’t as robust as the Big Berkey and there are several areas the Big Berkey filtration is superior including copper, Chromium VI and lead. In fact, the Big Berkey filters over 3% more lead than the Alexapure Pro. Both systems take approximately one hour to filter one gallon of water.

Big Berkey
Alexapure Pro
Cost $278 $249.95
Price Per Gallon (6000 Gallons) 6.2¢
Capacity (Gallons) 2.25 2.25
Filter Max Lifespan 6000 Gallons 5000 Gallons
Replacement Filter Cost $120 (set of 2) $119.95 (set of 1)
Lead % Removed >99.9% >96.4%
Chlorine % Removed
Chromium VI % Removed >99.8% 98.7%
Chloroform % Removed
Copper % Removed >99.9% >99.0%

Bottom Line

Berkey Filters beats out Alexapure in overall cost, filtration, filter lifespan and even warranty. Berkey Filter offers an exclusive lifetime warranty on products while Alexapure offers a one-year warranty. When you compare these systems, the ideal choice for water filtration is the Big Berkey and Berkey Filters.

Take a look at more brand comparisons on our website.