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Reverse Osmosis Water Filter Replacement Cartridges and Kits

Reverse Osmosis: a water purification technology that utilizes a semi-permeable membrane to remove microscopic particles (typically anything larger than 0.001 microns in size) from drinking water.

Select what type of reverse osmosis filter part you’re searching for (system, filter, etc.) and browse or search through hundreds of our reverse osmosis water filters, systems, membranes, and other water filter parts. Choose from some of the industry’s top reverse osmosis brands including, Watts®, Hydrologic, Hydrotech, and Water Factory Systems.

Not sure if investing in a reverse osmosis water filter is what you want, then check out our thousands of other popular water filters, including whole house, under sink, faucet filters, and many more.

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  1. WROM-230T American Plumber Reverse Osmosis Replacement Membrane

    WROM-230T American Plumber Reverse Osmosis Replacement Membrane

    Fits American Plumber WRO-3000 Reverse Osmosis System Learn More
  2. WROM-230TN American Plumber Reverse Osmosis Replacement Membrane

    WROM-230TN American Plumber Reverse Osmosis Replacement Membrane

    Fits American Plumber WRO-3500 Reverse Osmosis System Learn More
  3. WROM-25T American Plumber Reverse Osmosis Membrane

    WROM-25T American Plumber Reverse Osmosis Membrane

    Fits the American Plumber WRO-4500 Learn More
    $96.99 MSRP:  $113.84
  4. WROR American Plumber Reverse Osmosis Replacement Filter Kit

    WROR American Plumber Reverse Osmosis Replacement Filter Kit

    Fits American Plumber WRO-3500 and WRO-3000 Reverse Osmosis Systems Learn More
    $43.99 MSRP:  $51.74
  5. 3M Aqua-Pure AP124 Whole House Water Filter Cartridge

    AP124 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99 MSRP:  $17.24
  6. 3M Aqua-Pure AP124-3 Water Filter

    AP124-3 3M Aqua-Pure Replacement Water Filter

    Fits standard filtration system housings that accept 30-inch x 2.5-inch water filter cartridges Learn More
  7. TLC-150EB Desal Encapsulated Reverse Osmosis Membrane

    TLC-150EB Desal Encapsulated Reverse Osmosis Membrane

    Fits commercial reverse osmosis systems that accept 150 gallon per day encapsulated membranes Learn More
  8. 22125 Hydrologic Stealth-RO Replacement Sediment Filter

    22125 Hydrologic Stealth-RO Sediment Filter

    Fits the Stealth RO100/200 or filtration system housing that uses 10 inch by 2.5 inch filters Learn More
    $13.99 MSRP:  $15.51
  9. ROM-16C Pentek Reverse Osmosis Replacement Membrane

    ROM-16C Pentek Reverse Osmosis Replacement Membrane

    Fits US Filter RO-2127 Learn More
    $52.79 MSRP:  $76.99
  10. ROM-230TN Pentek Reverse Osmosis Membrane

    ROM-230TN Pentek Reverse Osmosis Membrane

    Fits select Pentek, Culligan, Ametek, American Plumber, USFilter and other brands of reverse osmosis systems Learn More
    $80.39 MSRP:  $118.99
  11. ROM-26T Pentek Reverse Osmosis Membrane

    ROM-26T Pentek Reverse Osmosis Membrane

    Fits select Pentek, Culligan, Ametek, American Plumber, USFilter and other brands of reverse osmosis systems Learn More
    $73.99 MSRP:  $84.05
  12. TQ56-36FC PuROTwist PuROTwist Reverse Osmosis Membrane

    TQ56-36FC PuROTwist PuROTwist Reverse Osmosis Membrane

    Fits the third stage of the PuROTwist 3000 and 4000 reverse osmosis systems Learn More
    $80.39 MSRP:  $104.99
  13. TQ56-50FC PuROTwist PuROTwist Reverse Osmosis Membrane

    TQ56-50FC PuROTwist Reverse Osmosis Membrane

    Fits the third stage of the PuROTwist 3000 and 4000 reverse osmosis systems Learn More
    $77.09 MSRP:  $113.99
  14. 54846 Tier1 Reverse Osmosis Tank Pressure Gauge
  15. 6570090 Tier1 Plastic Tank Ball Valve

    6570090 Tier1 Plastic Tank Ball Valve

    Fits 1/4-inch connections on water line and top of reverse osmosis tank Learn More
    $10.99
  16. 6570590 Tier1 Plastic Tank Ball Valve

    6570590 Tier1 Plastic Tank Ball Valve

    Fits 3/8-inch connection on water line and 1/4-inch connection on top of reverse osmosis tank Learn More
    $6.99 MSRP:  $10.34
  17. TPG-100 Tier1 Reverse Osmosis Tank Pressure Gauge
  18. FPMB20-978 Watts Flo-Pro Replacement Filter Cartridge

    FPMB20-978 Watts Flo-Pro Replacement Water Filter

    Fits most standard water filtration system housings that use a 9 7/8-inch x 2 1/2-inch filter Learn More
    $3.99 MSRP:  $5.16
  19. FPMB5-20 Watts Flo-Pro Replacement Filter Cartridge

    FPMB5-20 Watts Flo-Pro Water Filter Cartridge

    Fits water filtration system housing that accept a 20-inch x 2 1/2-inch filter Learn More
    $5.99 MSRP:  $6.89
  20. FPMB5-978 Watts Flo-Pro Replacement Filter Cartridge

    FPMB5-978 Watts Flo-Pro Water Filter Cartridge

    Fits water filtration system housings that accepts a 9 7/8-inch x 2 1/2-inch filter Learn More
    $4.99 MSRP:  $5.16
  21. MAXETW-975 Watts C-MAX Replacement Filter Cartridge

    MAXETW-975 Watts C-MAX Replacement Water Filter Cartridge

    Fits water filtration system housings requiring a 9 3/4-inch x 2 7/8-inch filter Learn More
    $12.59 MSRP:  $18.99
  22. MAXPB-975 Watts C-MAX Replacement Filter Cartridge

    MAXPB-975 Watts C-MAX Water Filter Cartridge

    Fits water filtration system housings that use a 9 3/4-inch x 2 7/8-inch filter Learn More
    $18.99 MSRP:  $27.99
  23. MAXVOC-975 Watts C-MAX Replacement Filter Cartridge

    MAXVOC-975 Watts C-MAX Water Filter Cartridge

    Fits standard 10-inch x 2.5-inch water filtration system housings Learn More
    $18.99 MSRP:  $22.99
  24. W-1812-24 Watts Replacement Reverse Osmosis Membrane
  25. W-1812-36 Watts Replacement Reverse Osmosis Membrane

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