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Water Filtration Systems & Filters

Discount Filter Store carries a wide variety of water filters and filtration systems to make sure that you have clean water everywhere you need it. We offer camping water filters, RV filters, water bottles for travelers on the go. Purify your office or home’s drinking water with countertop filter systems, commercial grade filters, and whole house filter systems. Our filters are protected by our 100% Price Match Guarantee. We are happy to offer you the lowest possible price on our filters, matching any lower price listed by competitors.

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  1. P5-20 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    P5-20 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More

    (Retail Price: $189.99 ) $50.00

  2. 602974 Viqua Quartz Sleeve for 602854 UV Lamp

    602974 Viqua Quartz Sleeve for 602854 UV Lamp

    For use with Viqua ultraviolet disinfection systems using the 602854 UV lamp Learn More
    $50.99 MSRP:  $68.00
  3. FRSS-1.5 Sterilight 1.5 GPM 1/2-inch Flow Restrictor
  4. FRSS-1.5 Viqua 1.5 GPM 1/2-inch Flow Restrictor

    FRSS-1.5 Viqua 1.5 GPM 1/2-inch Flow Restrictor

    1/2 x 1/2 inch FNPT fitting Learn More
    $52.99 MSRP:  $90.00
  5. Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 40 x 2.5-inch filters Learn More
    $52.99 MSRP:  $67.99
  6. DuPont WFROM1000X Quick Twist Reverse Osmosis Membrane

    DuPont WFROM1000X Quick Twist Reverse Osmosis Membrane

    Fits the Dupont WFRO60X Reverse Osmosis System Learn More
  7. C2-02 Advanced Water Products 20-inch x 4.5-inch Replacement Carbon Whole House Filter

    C2-02 Advanced Water Products Replacement 20-inch x 4.5-inch Carbon Whole House Filter

    Fits most 20-inch x 4.5-inch filter housings, including the Trojan UV Max IHS12-D4 and IHS22-D4 Water Disinfection Systems Learn More
  8. C2-02 Viqua Carbon Whole House Filter

    C2-02 Viqua Carbon Whole House Filter

    Fits most 20 x 4.5-inch filter housings including the Viqua IHS12-D4 and IHS22-D4 water disinfection systems. Learn More
    $54.99 MSRP:  $89.00
  9. SDC-45-1010 Hydronix Whole House Sediment Filter Cartridge (6-Pack)

    SDC-45-1010 Hydronix Whole House Replacement Sediment Filter Cartridge (6-Pack)

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More

    $55.99

  10. SDC-45-1020 Hydronix Whole House Sediment Filter Cartridge (6-Pack)

    SDC-45-1020 Hydronix Whole House Replacement Sediment Filter Cartridge (6-Pack)

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More

    $55.99

  11. 602734 Viqua Quartz Sleeve for 602807 UV Lamp

    602734 Viqua Quartz Sleeve for 602807 UV Lamp

    For use with Viqua ultraviolet disinfection systems using the 602807 UV lamp Learn More
    $57.99 MSRP:  $76.00
  12. 602975 Viqua Quartz Sleeve for 602855 UV Lamp

    602975 Viqua Quartz Sleeve for 602855 UV Lamp

    For use the Viqua ultraviolet disinfection system using the 602855 UV lamp Learn More
    $57.99 MSRP:  $77.00
  13. Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 30 x 2.5-inch filters Learn More
    $57.99 MSRP:  $72.99
  14. APRC1-P AquaPatrol Ice Machine Replacement Water Filter

    APRC1-P AquaPatrol Ice Machine Replacement Water Filter

    Fits the Scotsman ADS-AP1 AquaPatrol Water Filtration System Learn More
    $58.05 MSRP:  $94.99
  15. WSQC-2 WaterSentinel Reverse Osmosis Carbon GAC Filter Cartridge
  16. Pentek 150236 Big Blue Heavy Duty Filter Housing

    Pentek 150236 Big Blue Heavy Duty Filter Housing

    Receives any standard 20 inch by 4.5 inch filter cartridge Learn More
    $58.99 MSRP:  $73.99
  17. SDC-45-1005 Hydronix Whole House Sediment Filter Cartridge (6-Pack)

    SDC-45-1005 Hydronix Whole House Replacement Sediment Filter Cartridge (6-Pack)

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More

    $58.99

  18. 8017757 Katadyn MyBottle Ultralight Series 24-Ounce Personal Water Purifier Bottle - Green Deer
  19. QS-012 Viqua Quartz Sleeve for S740RL-4C UV Lamp

    QS-012 Viqua Quartz Sleeve for S740RL-4C UV Lamp

    For use with Viqua ultraviolet disinfection systems using the S740RL-4C UV lamp Learn More
    $59.99 MSRP:  $77.00
  20. 22120 Hydrologic Stealth RO 100GPD Membrane

    22120 Hydrologic Stealth RO 100GPD Membrane

    Fits 1/4-inch inline shut-off valve Learn More
    $59.99 MSRP:  $64.99
  21. Hydronix HF45-10BLBK15 Filter Housing (Blue)

    Hydronix HF45-10BLBK15 Filter Housing (Blue)

    Accepts standard 10 x 4.5-inch filters Learn More
    $59.99 MSRP:  $75.99
  22. 602974 Trojan UV Max Quartz Sleeve

    602974 Trojan UV Max Quartz Sleeve

    Fits Trojan UVMAX G, G Plus and Pro10 Systems Learn More
  23. Pentek 166142 Big White 20-inch x 4.5-inch Filter Housing

    Pentek 166142 Big White 20-inch x 4.5-inch Filter Housing

    Receives any standard 20-inch by 4.5-inch filter cartridge Learn More
    $51.99 MSRP:  $65.54
  24. W9123053 Doulton UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge

    W9123053 Doulton UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge

    Fits Doulton HIP, HIS and HCPS housings (NOT gravity-fed) Learn More
    $52.99 MSRP:  $59.25
  25. ZR-006 ZeroWater Replacement Filter Cartridge (4-Pack)

    ZR-006 ZeroWater Replacement Filter Cartridge (4-Pack)

    Fits ZeroWater brand pitchers, dispensers and water cooler bottles Learn More
    $55.99 MSRP:  $79.99

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