What replacement filters fit a Pentair GRO-475B?

The Pentair GRO-475B reverse osmosis system uses 4 filter stages.

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Key takeaways

Reverse Osmosis system by Pentair.
4 filter stages: FDF1-RC, GRO75-RC, F1B1-RC, F1GC-RC.
A component cartridge is NSF-listed, though the system itself isn't separately listed.
A cheaper compatible filter set can fit the same housings - confirm its own certification before buying.

Reverse Osmosis SystemGRO-475BPentair

Buy the replacement filters for your GRO-475B

Genuine Pentair filter setThe exact replacement cartridges for the Pentair GRO-475B.Shop the filter set Cheaper filters that fitCompatible cartridges fit the same housings for less - confirm any NSF certification claim independently before you buy.Shop compatible filters

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Filter stages

Stage 1: FDF1-RC
Stage 2: GRO75-RC
Stage 3: F1B1-RC
Stage 4: F1GC-RC

NSF-certified components in the GRO-475B filter set

The GRO-475B system itself isn't separately listed in the NSF database, but at least one of its cartridges is independently NSF-listed to reduce the following, grouped by the standard it was tested to:

NSF/ANSI 42 - Chlorine

Chlorine, Taste and Odor, Nominal Particulate

NSF/ANSI 53 - Atrazine

Atrazine, Cyst, Lead

NSF/ANSI 58 - Arsenic (Pentavalent)

Arsenic (Pentavalent), Barium, Cadmium, Chromium (Hexavalent), Chromium (Trivalent), Copper, Cyst, Fluoride, Lead, Radium 226/228, Selenium, Turbidity, TDS, Nitrate/Nitrite

NSF/ANSI 401 - Microplastics

Microplastics

Filters for the rest of your home

FiltersDex covers the exact replacement filter - and what it removes - across every appliance:

Refrigerator filterswater + air, by fridge model Air purifier filtersLevoit, Coway, Honeywell, Winix Vacuum filtersShark & Dyson, HEPA + foam Humidifier filterswicks + furnace pads Water pitcher filtersBrita, PUR, ZeroWater - NSF

Frequently asked

What replacement filters fit a Pentair GRO-475B?

The Pentair GRO-475B uses 4 filter stages: FDF1-RC, GRO75-RC, F1B1-RC, F1GC-RC.

Is the Pentair GRO-475B NSF certified?

The Pentair GRO-475B system itself isn't separately listed in the NSF DWTU database, but at least one of its filter cartridges is independently NSF-listed.

Does the Pentair GRO-475B remove lead?

We don't have an independent NSF listing for the Pentair GRO-475B, so we can't confirm a lead-reduction claim either way. Check the manufacturer's own certification documents.

Should I buy the genuine filter set or an aftermarket one?

The genuine Pentair cartridges are the safe, exact-fit choice. A cheaper compatible set can fit the same housings too - just confirm it carries its own independent certification for the contaminants you care about before buying.