Big+ 2.75-Gallon Gravity Water Filter with Fluoride Reduction

Score: 7.6/10 | The ProOne Big+ delivers what Berkey promises but with actual third-party verification. While not NSF certified (the certification process differs for gravity systems), ProOne publishes lab results from EPA-accredited facilities testing to NSF protocols. This transparency, combined with USA-based support and reasonable pricing, makes it the gravity-fed system I recommend.

ProOne submits filters to EPA-accredited laboratories testing to NSF 42 and 53 protocols. Results are published on their website. This is not the same as NSF certification, but provides meaningful verification Berkey lacks.

• Chlorine: 99.9%
• Lead: 99.9%
• Fluoride: 95%+ (with optional filter)
• PFAS: Claimed but limited verification
• Bacteria: 99.9999%

USA-based company in Wyoming with responsive customer service. Willingly discusses testing methodology and limitations.

Larger than Big Berkey (2.25 gallons), serving households of 4-6 comfortably.

Each G2.0 filter element handles approximately 1,200 gallons. Pair of filters provides 2,400 gallons total, roughly 2-3 years for typical families.

No plumbing, no electricity. Fill the top chamber, gravity does the rest. Portable for camping or emergency preparedness.

The PF-2 fluoride/arsenic reduction filters attach below the G2.0 elements. Essential for communities with fluoridated water if fluoride reduction is your goal.

Slightly less than Big Berkey ($415) with better transparency and USA support.

Filter elements ($120/pair) lasting 2-3 years make ongoing costs reasonable.

The ProOne Big+ is the gravity-fed system for families wanting Berkey-style convenience with actual evidence of performance. Third-party lab testing, published results, and USA-based support provide accountability that Berkey lacks.

Score: 7.6/10 | The ProOne Big+ delivers what Berkey promises but with actual third-party verification. While not NSF certified (the certification process differs for gravity systems), ProOne publishes lab results from EPA-accredited facilities testing to NSF protocols. This transparency, combined with USA-based support and reasonable pricing, makes it the gravity-fed system I recommend.

ProOne submits filters to EPA-accredited laboratories testing to NSF 42 and 53 protocols. Results are published on their website. This is not the same as NSF certification, but provides meaningful verification Berkey lacks.

• Chlorine: 99.9%
• Lead: 99.9%
• Fluoride: 95%+ (with optional filter)
• PFAS: Claimed but limited verification
• Bacteria: 99.9999%

USA-based company in Wyoming with responsive customer service. Willingly discusses testing methodology and limitations.

Larger than Big Berkey (2.25 gallons), serving households of 4-6 comfortably.

Each G2.0 filter element handles approximately 1,200 gallons. Pair of filters provides 2,400 gallons total, roughly 2-3 years for typical families.

No plumbing, no electricity. Fill the top chamber, gravity does the rest. Portable for camping or emergency preparedness.

The PF-2 fluoride/arsenic reduction filters attach below the G2.0 elements. Essential for communities with fluoridated water if fluoride reduction is your goal.

Slightly less than Big Berkey ($415) with better transparency and USA support.

Filter elements ($120/pair) lasting 2-3 years make ongoing costs reasonable.

The ProOne Big+ is the gravity-fed system for families wanting Berkey-style convenience with actual evidence of performance. Third-party lab testing, published results, and USA-based support provide accountability that Berkey lacks.