Which is better for a family of four?

The BOROUX. Its 3-gallon tank holds more and its filters last about 12 months. The Big Berkey is rated for 1 to 4 people but holds 2.25 gallons.

Is the BOROUX worth $149 more?

If you want certification, a lifetime chamber warranty and a bigger tank, yes. If price and speed matter most, the Big Berkey is the cheaper pick.

Which filters last longer?

The BOROUX Foundation Filters last about 12 months, or 24 months with four filters. Black Berkey elements are rated at 3,000 gallons each, so life depends on how much you drink.

Do either remove fluoride?

Both need optional add-on filters for fluoride. The Big Berkey uses PF-2 filters and the BOROUX takes 2 or 4 fluoride filters.

Which is faster to fill a glass?

The Big Berkey. It lists about 7 gallons per hour against about 1 gallon per hour for the BOROUX.

Only the BOROUX lists certification: WQA to NSF/ANSI 42, 401 and 372. The Big Berkey listing shows no NSF certification.

Berkey Big Gravity Water Filter vs BOROUX 3-Gallon Water Filter System

Buy the BOROUX if you want the larger tank, a longer filter life and a lifetime warranty on the steel chambers. Buy the Big Berkey if you want the lower price and a system that can take optional fluoride filters. The Big Berkey is $249.99 at eBay as of November 6, 2026, and the BOROUX is $399.00 at Amazon as of the same date.

Today the Berkey Big Gravity Water Filter costs $149.01 less at its best price.

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