Pentair FloPlus Protect 20BB Whole Home PFAS Filtration System

This is the only whole-house PFAS unit in this batch with a real point-of-entry listing that is sold online with a price. It is a single 20 inch Big Blue carbon block, not a tank, and it is certified only at 5 gpm. The spec sheet shows pressure drop rising from 3 psi at 5 gpm to 7 psi at 10 gpm, so a large house may outrun it. Price: Fresh Water Systems $324.85 (in stock per store JSON). affordablewater.us charges $369, has a 14-day return window and a 25% restocking fee. The cartridge costs $168.71 at FWS, $136.38 at WaterFilters.NET and $172.09 at affordablewater.us. Filter life: Pentair's spec sheet says about 12 months, but affordablewater.us says every 4 months. At 40,000 gallons, a home using 300 gallons a day would need a new cartridge about every 4.5 months, so real cost is likely $340 to $500 a year in cartridges. Chlorine reduction is based only on Pentair internal testing, not certified. Retailer specs conflict with Pentair's: FWS lists a 1 1/2 inch FPT inlet and 0.5 micron, while the spec sheet and manual say 1 inch FPT and 1 micron. The manual says to install after the water meter or pressure tank and not on microbiologically unsafe water. The old Pentair product URL now redirects to the cartridge page, but the system SKU page and a 2026 spec sheet are live. Ferguson also lists it as Everpure 150736, but the page was not fetchable. No Pentair affiliate program for this line: Pentair sells it only through dealers and retailers, and the old Pentair Water Solutions (Pelican) program on FlexOffers shows as not active (pelicanwater.com refused connections on 2026-09-27).