ProOne Single 7-inch Prepper Replacement Filter for ProOne Big+ and Traveler+ Countertop Gravity Water Filter System, Independently Tested Proven to Reduce PFAS

Excellent, A positive replacement for Berkey filters specifically for the Go Berkey. If fact these are definitely better and water taste delicious. Really no negative on these filters just that they don’t last as long as the Berkey filters. But Berkey manufacturing customer service will not solve the simple problem of their black filters being to large for the Go Berkey meaning 1 inch sitting above the upper chamber. 12 plus years as a customer and they say the filters are working properly! Go figure, now I’m a ProOne customer! Fast shipping, reasonable pricing and definitely better than the Berkey water filters! They say 6 months or 600 gallons for this 7 inch proOne filter. These are the slimline and not the larger size. The 5 inch also fits 500 gallon or 4 monthes.I’m not sure on the 9 inch because the Go Berkey upper chamber is 8.75 tall . Buy with confidence!

This product is the SLIMLINE version of the original ProOne® G2.0 7" Filter Elements I bought with my Propur Big filter system. It is only designed to filter for 4 months or 600 gallons versus 6 months or 1,000 gallons of the standard elements (according to the manufacturer's website prooneusa.com), so they're not as cost effective :-(