Discount Water Filters and Air Filters at Discount Filter Store.com

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Reverse Osmosis Water Filter Replacement Cartridges

Keep your reverse osmosis system up and running smooth with a new reverse osmosis water filter.

Your reverse osmosis water filter plays a crucial role in your reverse osmosis filtration system, so it’s important to change it out periodically (ideally once every 6-12 months). By doing so, you’ll extend the life of not only your entire reverse osmosis system but also the life of your RO membrane.

Below you’ll find over 40+ reverse osmosis water filter brands and sets, at a price guaranteed to beat the big box store prices. All of our reverse osmosis water filters are included in our 100% Price Match Guarantee. Meaning if you find a RO water filter priced somewhere else for less than our price, we’ll match the lower price. Shopping for a new RO water filter doesn’t get much better than that.

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  • WQCSC11 Watts Kwik-Change Sediment Filter Cartridge

    WQCSC11 Watts Kwik-Change Sediment Filter Cartridge

    $11.99
    MSRP: $16.09
    Save 25%
  • WQCHFC11 Watts Kwik-Change Hollow Fiber (UF) Water Filter Cartridge
  • MAXVOC-975 Watts C-MAX Replacement Filter Cartridge

    MAXVOC-975 Watts C-MAX Water Filter Cartridge

    $18.99
    MSRP: $22.99
    Save 17%
  • MAXPB-975 Watts C-MAX Replacement Filter Cartridge

    MAXPB-975 Watts C-MAX Water Filter Cartridge

    $19.29
    MSRP: $27.99
    Save 31%
  • MAXETW-975 Watts C-MAX Replacement Filter Cartridge

    MAXETW-975 Watts C-MAX Replacement Water Filter Cartridge

    $12.79
    MSRP: $18.99
    Save 33%
  • FPMB5-978 Watts Flo-Pro Replacement Filter Cartridge

    FPMB5-978 Watts Flo-Pro Water Filter Cartridge

    $4.99
    MSRP: $5.16
    Save 3%
  • FPMB5-20 Watts Flo-Pro Replacement Filter Cartridge

    FPMB5-20 Watts Flo-Pro Water Filter Cartridge

    $5.99
    MSRP: $6.89
    Save 13%
  • FPMB20-978 Watts Flo-Pro Replacement Filter Cartridge

    FPMB20-978 Watts Flo-Pro Replacement Water Filter

    $3.99
    MSRP: $5.16
    Save 23%
  • CB-25-1005 Hydronix Replacement Filter Cartridge

    CB-25-1005 Hydronix Replacement Filter Cartridge

    $10.69
    MSRP: $14.99
    Save 29%

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