Pentair Review, Is Pentair Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 3 graded products, Pentair averages Excellent (95/100). On disclosure, the brand says nothing publicly about PFAS. 3 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from Pentair Good or better, safest first
Pentair
3/4" Inlet 5 gpm Whole House Water Filter System U25-S-S18
Activated carbon and sediment filter media; polypropylene/polyester housing components
Bacterial growth and biofilm in unmaintained filter housing
Whole-house carbon filters are not sterile environments; if cartridges are not replaced…
Carbon media dust or fines in water after installation
New activated carbon cartridges can shed fine black particles during initial use. This is…
Lead
If sediment load in incoming water is higher than expected, the pre-filter can become…
PFAS
Standard activated carbon filters are not marketed as PFAS-removing systems and have…
Lower-concern for PFAS; standard water filter media typically not PFAS-containing, no Pentair transparency.
⚠Brand says nothing about PFAS
Pentair
OMNIFilter Whole House Filter System
Activated carbon filter media, polypropylene housing
Activated carbon dust and microparticle release
New carbon filters can release fine black particles (activated carbon dust) into water…
Bacterial biofilm growth in cartridge
Activated carbon can harbor bacteria if water sits stagnant or if cartridge replacement…
Housing seal degradation and unfiltered water bypass
Polypropylene seals can weaken if exposed to temperatures above system rating or if…
Lower-concern filter type, but Pentair has not disclosed PFAS stance; verify independently if critical.
⚠Brand says nothing about PFAS
Pentair
Everpure FXI-22 FX Water Filtration System
activated carbon, ion-exchange resin cartridge
Bacterial growth in filter cartridge (maintenance-dependent)
Activated carbon and resin are biologically inert but can accumulate biofilm if flow…
Resin bed breakthrough (ion breakthrough)
Exhausted ion-exchange resin can begin to release sodium or hydrogen ions if cartridge is…
Carbon dust or fines in water (post-installation)
New activated carbon cartridges can release fine black particles in the first few liters…
Lower concern; standard carbon or resin filter design without PFAS-prone coatings, no brand transparency.
⚠Brand says nothing about PFAS
Every grade uses the same public rubric. How grades work →