Water Filter Compatibility Finder
Enter your whole-house or under-sink system’s model number below to find your exact, verified-compatible replacement filter.
Whole-house and under-sink water filters aren’t interchangeable, and even within under-sink systems, GE’s and Whirlpool’s parts are completely different families. This tool matches your exact housing or system model (like GXWH40L, RFC-BBSA, WHER25, or GXSL55R) to a verified-compatible replacement, so you’re not guessing from a part number that looks similar.
FilterFitNow
Find the exact water filter your system takes.
Whole-house and under-sink systems use completely different parts — this tool tells you which is which.
Its verified system models will appear here — tap the one that matches yours.
See our affiliate disclosure.
Prices and availability vary — always confirm the model printed on your own housing before buying.
Water Filter Cross-Reference (All Supported Systems)
Verified system models and the replacement parts they take. Full detail and replacement steps are on the dedicated guides linked below.
| System Model | Brand | Replacement Part(s) | Type |
|---|---|---|---|
| GXWH40L / GXWH35F | GE | FXHTC (carbon) or FXHSC (sediment) | Whole House |
| RFC-BBSA | Culligan | FXHTC | Whole House |
| W10-PR / W10-BC / WRC25HD | American Plumber | FXHTC | Whole House |
| GXSL55R / GXSV65R / GNSV70R / GXK285JBL / GXK295JNN | GE | FQK2J | Under Sink |
| WHAROS5 / WHAPSRO / WHER25 | Whirlpool | WHEERF + WHEERM | Under Sink (RO) |
| WHADUS5 / WHED20 | Whirlpool | WHEEDF | Under Sink (Dual-Stage) |
Not Sure Which One You Have?
If your filter housing is near your water meter or where the main line enters your home, and it’s plumbed into more than one fixture, it’s a whole house system. If it’s a small housing tucked under your kitchen sink feeding just one tap, it’s an under sink system. Whole house and under sink cartridges are not interchangeable, even when the size looks similar.
Full Replacement Guides
GE, Culligan & American Plumber Whole House Guide →
Full replacement steps, cartridge type (FXHTC vs FXHSC), and sizing detail.
FXHTC vs. FXHSC: Which Whole House Filter Do You Need? →
Both cartridges fit the same housing but filter completely different things — this guide covers which one you actually need.
GE & Whirlpool Under Sink Guide →
Full part-by-part replacement schedule for GE’s single cartridge set and Whirlpool’s 3-part RO system.
Whole House Filter Sizing & Type Guide →
Not sure what size or media type your system needs? Covers 10″ vs. 20″ cartridges and sediment vs. carbon vs. carbon+KDF media.
How We Verified This
Same verification standard as our refrigerator, HVAC, vacuum, and range hood filter guides — cross-referenced against manufacturer specs and independent retailer data, not just similar-looking part numbers. Every code in this tool’s database has cleared that process; if your exact model isn’t returning a match, it means we haven’t independently confirmed it yet, not that we’ve guessed and gotten it wrong. Read the full verification methodology →
Frequently Asked Questions
Do GE and Whirlpool under-sink filters use the same replacement cartridge?
No. They’re entirely different systems — GE’s is a single dual-flow cartridge set, Whirlpool’s WHER25 family is a three-part reverse osmosis system. A cartridge from one won’t fit the other’s housing.
Is my under-sink filter the same as my whole-house filter?
No. Under-sink systems filter water at one tap only. Whole house systems filter everything entering your home at the main line. An under-sink filter is a point-of-use system, sized to treat only the drinking and cooking water drawn from that one faucet, which is why it can use a smaller, less expensive cartridge. A whole-house filter is a point-of-entry system installed on the main supply line, so it protects every fixture in the home, including showers, laundry, and water-using appliances like water heaters and dishwashers, from sediment and chlorine before it ever reaches them. Many households use both together: a whole-house filter for general sediment and chlorine reduction, and a dedicated under-sink or reverse-osmosis system at the kitchen tap for drinking-water-specific contaminant reduction. Choosing between them comes down to what you’re trying to protect: drinking water quality at one faucet, or the plumbing and appliances throughout the whole house.
What if my exact system model isn’t listed here?
We do not publish a match until we have independently verified it. If a model does not appear, check the full guides linked above, or check back as coverage is actively expanding. Under-sink and whole-house system model numbers are typically printed on a label on the housing itself or the manufacturer’s installation manual, rather than on the water filter cartridge, since one housing can often accept several different cartridge options over its lifespan. If you can identify the housing’s brand and model but not the correct cartridge, the manufacturer’s own parts lookup is usually the fastest way to confirm the exact replacement cartridge code before buying a compatible option. Photographing the label before searching, rather than relying on memory, helps avoid ordering the wrong cartridge for a housing that looks similar to a different model in the same manufacturer’s lineup.
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Affiliate Disclosure
Some pages linked from here contain affiliate links that may earn us a commission. This never affects which filter we recommend — see our full affiliate disclosure.
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