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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. CB1 OmniFilter Undersink Filter Replacement Cartridge

    CB1-SS6-S06 OmniFilter Undersink Water Filter Cartridge

    For use in any brand of undersink water filtration systems that use 9 3/4-inch x 2 1/2-inch water filter cartridges Learn More
    $33.99
  2. HF10-MS Cuno Whole House Filter Replacement Cartridge

    HF10-MS Cuno Whole House Filter Replacement Cartridge

    Fits the Cuno Food Service High Flow Series Models including all SGP, ESP, BREW, BEV, and ICE Systems Learn More

    Regular Price: $65.99

    Special Price: $50.05

  3. W9120145 Doulton Replacement Candle Set (6-Pack)

    W9120145 Doulton Replacement Candle Set (6-Pack)

    Fits the RIO 2000 High-Flow Multi-Candle filter module Learn More
    $104.99 Retail Price:  $118.30
  4. W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    Fits the (S) type thread mount in HIP, HCP and HIS housings Learn More
    $30.99 Retail Price:  $39.96
  5. W9121020 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9121020 Doulton Undersink Ceramic Candle Water Filter Cartridge

    Fits all Doulton Gravity systems Learn More
    $25.99 Retail Price:  $36.02
  6. W9121200 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9121200 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    Fits Doulton gravity fed systems Learn More
    $34.99 Retail Price:  $39.97
  7. W9330962 Doulton Sterasyl Undersink Ceramic Candle Filter System
  8. FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $22.99
  9. CBF1-S-05 OmniFilter Undersink Filter System

    CBF1-S-05 OmniFilter Undersink Water Filtration System

    Engineered to fit standard 1/2-inch NPS supply threads Learn More
    $73.99 Retail Price:  $88.54
  10. FLOPLUS-10 Pentek Replacement Filter Cartridge

    FLOPLUS-10 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 10-inch x 2.5-inch water filter cartridges Learn More
    $15.99 Retail Price:  $21.26
  11. WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge

    WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge

    Fits the Whirlpool WHKF-DUF Under Sink Filter Housing Learn More
    $15.99 Retail Price:  $17.34
  12. Whirlpool WHKF-DB2 Undersink Replacement Water Filter Cartridge

    WHKF-DB2 Whirlpool Undersink Replacement Filter Cartridge

    Fits the Whirlpool WHKF-DUF Under Sink Filter Housing Learn More
    $21.99
  13. CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    Fits in compact 5-inch water filter housings Learn More
    $9.99 Retail Price:  $16.55
  14. CBR2-10 Pentek Undersink Filter Replacement Cartridge

    CBR2-10 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $18.99
  15. W9220402 Doulton Slim Line Replacement Ceramic Filter

    W9220402 Doulton Slim Line Replacement Ceramic Filter

    Fits most standard 2.5-inch by 10-inch filter housings Learn More
    $30.99 Retail Price:  $34.55
  16. W9330958 Doulton SuperCarb Undersink Ceramic Candle Filter System

    W9330958 Doulton SuperCarb Undersink Ceramic Candle Filter System

    Fits 10 inch by 2 inch short thread filter candles Learn More
    $181.99 Retail Price:  $203.65
  17. W9121302 Doulton Imperial Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9121302 Doulton Imperial Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    Fits all Doulton Gravity systems Learn More
    $52.99 Retail Price:  $59.70
  18. W9331028 Doulton SuperCarb Countertop Filter System

    W9331028 Doulton HCP SuperCarb Countertop Filter System

    Fits 10 inch by 2 inch short thread filter candles Learn More
    $147.99 Retail Price:  $174.79
  19. W9121202 Doulton AquaCera Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  20. CBC-10 Pentek Replacement Filter Cartridge

    CBC-10 Pentek Replacement Filter Cartridge

    Fits most housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $15.99 Retail Price:  $18.34
  21. Pentek CFB-PB10 Lead & Cyst Carbon Filter

    Pentek CFB-PB10 Lead & Cyst Carbon Filter

    Perfect for well water applications with the potential for microorganisms Learn More
    $14.99 Retail Price:  $17.12
  22. Pentek SCBC-10 Silvered Carbon Block

    Pentek SCBC-10 Silvered Carbon Block

    Standard 10 inch by 2.5 inch size fits many under sink filter housings Learn More
    $22.99 Retail Price:  $24.71
  23. W9222909 Doulton Imperial SuperCarb OBE Replacement Element

    W9222909 Doulton Imperial SuperCarb OBE Ceramic Water Filter

    Fits most standard 2.5-inch by 10-inch water filtration system housings Learn More
    $55.99 Retail Price:  $59.71
  24. F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    Fits the InSinkErator F-201 Water Filtration System, and all Series 1100 and 2200 Instant Hot Water Dispensers Learn More
    $130.99 Retail Price:  $134.42

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