ProOne Big+ 3 Gal
A 3 gal stainless gravity filter that uses ProOne G2.0 filters. A mid-priced option, though the listing publishes little about flow, filter gallons or warranty.
Amazon $229.95$229.95
3 galNSF/ANSI 42
1 ProOne gravity water filter ranked. Each one is scored and ranked against every brand in its capacity, so "#3 mid-size" means third of all mid-size gravity filters here, not third among ProOne's own.
The ProOne Big+ 3 Gal is ProOne's only current gravity water filter here, ranked #3 of 6 2.5 to 3.5 gal and rated 3.1.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
ProOne gravity filters 1
- ProOne Big+ 3 Gal#3 2.5 to 3.5 galFull review
A 3 gal stainless gravity filter that uses ProOne G2.0 filters. A mid-priced option, though the listing publishes little about flow, filter gallons or warranty.
Amazon $229.95$229.953 galNSF/ANSI 42-