Pentair FreshPoint Replacement Filters (GRO-475B & GRO-575B)

Pentair FreshPoint Replacement Filters - Genuine Cartridges for the GRO-475B and GRO-575B Genuine Pentair replacement cartridges for the FreshPoint under-sink reverse osmosis systems: the 4-stage GRO-475B and the 5-stage PFAS-certified GRO-575B. Every cartridge clicks in and out with an integrated check valve that stops the water automatically, so changes take minutes with no water shutoff and no tools, and the color coding makes it impossible to seat a cartridge in the wrong slot. The Four Cartridges FDF1-RC Taste & Odor Pre-Filter ($59) - stage 1 in both systems. Carbon block plus poly spun sediment shell in one cartridge; it protects the membrane. Replace yearly. GRO75-RC 75 GPD RO Membrane ($159) - stage 2 in both systems. The high-efficiency Green RO membrane that does the certified heavy lifting. Replace every 18 months. F1B1-RC Cyst & Lead Carbon Block ($69) - stage 3 in the GRO-475B only. Replace yearly. F1GC-RC GAC Post-Filter ($49) - the final polishing stage in both systems. Replace yearly. Fitment, Honestly GRO-475B (4-stage): all four cartridges on this page. Yearly cost is $177 for the three filters, plus the $159 membrane every 18 months. GRO-575B (5-stage): the FDF1-RC, GRO75-RC, and F1GC-RC fit your system. The 575B's two middle carbon blocks are different: they are replaced together as the F2B2-RC2 twin pack, which we do not stock on this page. Call or text 800-460-5810 and we will get the twin pack to you with the rest of your order. Why stay on schedule? The NSF-certified reduction numbers for lead, arsenic, fluoride, and TDS only hold while the cartridges are within their service life, and those contaminants have no taste or smell to warn you when a filter is spent. Not sure which cartridge is due? Call or text Aidan at 800-460-5810, 7 days a week.