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

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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. P-250A Pentek Comparable Under Sink Filter Set by Tier1

    P-250A Pentek Comparable Under Sink Filter Set by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  2. WHKF-DB1 Whirlpool Comparable Under Sink Water Filter by Tier1

    WHKF-DB1 Whirlpool Comparable Under Sink Water Filter by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  3. WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1

    WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  4. FQSVF / FQSLF GE SmartWater Undersink Water Filter Replacement Cartridge Set By Tier1

    FQSVF / FQSLF GE SmartWater Undersink Water Filter Replacement Cartridge Set By Tier1

    Fits GE SmartWater undersink filter systems Learn More
    $46.99 MSRP:  $83.99
  5. FQK2J GE SmartWater Undersink Water Filter Replacement Cartridge Set by Tier1

    FQK2J GE SmartWater Undersink Water Filter Replacement Cartridge Set by Tier1

    Fits GE SmartWater undersink filter systems Learn More

    As Low As $0.00 Per Filter

  6. FQK2J GE Undersink Water Filter Set

    FQK2J GE Undersink Water Filter Set

    Fits GE SmartWater undersink filter systems Learn More
    $51.99
  7. Culligan D30 Comparable Carbon Block Whole House Water Filter by Tier1

    Culligan D30 Comparable Carbon Block Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More
    $11.99 MSRP:  $36.99
  8. CBC-10 Pentek Comparable Replacement Filter Cartridge by Tier1

    CBC-10 Pentek Comparable Replacement Filter Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  9. CBR2-10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    CBR2-10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  10. Floplus 10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    Floplus 10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  11. D-30 Culligan Comparable Carbon Block Whole House Water Filter by Tier1

    D-30 Culligan Comparable Carbon Block Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  12. CBR2-10R Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    CBR2-10R Pentek Comparable Carbon Block Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  13. FXULC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1

    FXULC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  14. CHLORPLUS-10 Pentek Comparable Whole House Water Filter by Tier1

    CHLORPLUS-10 Pentek Comparable Whole House Water Filter by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  15. D-40 Culligan Comparable Undersink Water Filter Replacement Cartridge by Tier1

    D-40 Culligan Comparable Undersink Water Filter Replacement Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  16. FXSVC GE SmartWater Comparable Undersink Filter Set by Tier1

    FXSVC GE SmartWater Comparable Undersink Filter Set by Tier1

    Fits various brands of under-sink housings, including GE Learn More

    As Low As $0.00 Per Filter

  17. CB1-SS6-S06 OmniFilter Comparable Undersink Water Filter Cartridge by Tier1

    CB1-SS6-S06 OmniFilter Comparable Undersink Water Filter Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  18. CB3-SS6-06 OmniFilter Comparable Undersink Filter Replacement Cartridge by Tier1

    CB3-SS6-06 OmniFilter Comparable Undersink Filter Replacement Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  19. FXUTC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1

    FXUTC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1

    Fits standard sized housings that take 10 x 2-1/2 inch replacement filters Learn More

    As Low As $0.00 Per Filter

  20. FX12P GE SmartWater Comparable Reverse Osmosis Filter Set by Tier1

    FX12P GE SmartWater Comparable Reverse Osmosis Filter Set by Tier1

    Fits GE SmartWater reverse osmosis filter systems with model numbers starting with PNRV12, GXRV10, or GXRM10 Learn More

    As Low As $11.99 Per Filter

  21. 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
    $35.00 MSRP:  $73.99
  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 MSRP:  $24.71
  23. Pentek QC10-CB1R Carbon Block Quick Change Filter

    Pentek QC10-CB1R Carbon Block Quick Change Filter

    Proprietary design fits Pentek QC systems exclusively Learn More
  24. 600R American Plumber Undersink Filter Replacement Cartridge

    600R American Plumber Undersink Water Filter Cartridge

    Built to fit into American Plumber WIC-600 and DW-600 undersink water filtration systems Learn More
    $31.99 MSRP:  $35.06
  25. WIC-600 American Plumber Undersink Filter System

    WIC-600 American Plumber Undersink Filter System

    Fits any 1/4-inch water line Learn More
    $55.99 MSRP:  $58.34

Items 26 to 50 of 228 total

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