Search·Watts
When you know your system or housing model number, this page lists the replacement cartridges we match to it—compare length, diameter, and micron rating before you order.
Brand
Watts
Model W50WHD
Watts Flowmatic whole house filter housing
Series: Flowmatic
These cartridge numbers are matched to this system model in our reference. Compare length, diameter, and micron rating with the filter you’re removing or your housing specs before ordering.
Best match first
SWC-10BB
Pentek string-wound cellulose cartridge
Replace about every 6 months
All details for this part (notes, compatible models, buying options when listed)
Other parts that also fit this model
Less common crosses — open each for full part details.
- DGD-5005Pentek dual-gradient sediment cartridge
- WP10BB97PPentek string-wound sediment cartridge
- EP-10BBPentek carbon block cartridge
- S1-BBPentek polypropylene sediment cartridge
- R50-BBPentek pleated sediment cartridge
- P5-BBPentek polypropylene sediment cartridge
- CBC-10BBPentek carbon block cartridge
- GAC-10BBPentek granular activated carbon cartridge
- DGD-5001Pentek dual-gradient sediment cartridge
- ECP1-10BBPentek pleated sediment cartridge
- ECP5-10BBPentek pleated sediment cartridge
- R30-BBPentek pleated sediment cartridge
- W50PEHDWatts pleated sediment cartridge
- CC-10BBPentek coconut shell GAC cartridge
- EPM-10BBPentek carbon block cartridge
- RFCCW-BBPentek radial-flow coconut carbon cartridge
- RFFE10-BBPentek iron reduction cartridge
- TO-10BBPentek organic / tannin reduction cartridge
- PCC-10BBPentek phosphate crystal cartridge
- FCB-10BBPentek fibrillated carbon block cartridge
- CFB-PLUS10BBPentek lead-reduction carbon block cartridge
- WP1BB97PPentek string-wound sediment cartridge
- WP25BB97PPentek string-wound sediment cartridge
Notes & next steps
Search again if you need a different model or part number.
Watts BB-style sump; commonly paired with W50PEHD cartridges and often cross-compatible with standard BB10 cartridges — verify o-ring and sump length.