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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. P5-478 Pentek Comparable Sediment Water Filter by Tier1

    P5-478 Pentek Comparable Sediment Water Filter by Tier1

    Fits standard filter housings using 5 x 2.5-inch filters Learn More
    $4.99 Retail Price:  $7.99
  2. FRSS-2.5 Sterilight 2.5 GPM 1/2-inch Flow Restrictor
  3. FRSS-2.5 Viqua 2.5 GPM 1/2-inch Flow Restrictor

    FRSS-2.5 Viqua 2.5 GPM 1/2-inch Flow Restrictor

    1/2 x 1/2 inch FNPT fitting Learn More
    $69.99 Retail Price:  $90.00
  4. S330RL Viqua Water Disinfection System UV Lamp

    S330RL Viqua Water Disinfection System UV Lamp

    Fits Viqua VT4 and S2Q-PA systems Learn More
    $69.99 Retail Price:  $89.00
  5. P1 Pentek Comparable Whole House Sediment Filter by Tier1 (4-Pack)

    P1 Pentek Comparable Whole House Sediment Water Filter by Tier1 (4-Pack)

    Fits most standard 10 x 2.5-inch housings Learn More

    $19.99

  6. Pentek EP-20 Replacement Water Filter Cartridge

    EP-20 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More

    As Low As $15.50 Per Filter

  7. EP-BB Pentek Replacement Filter Cartridge

    EP-BB Pentek Replacement Filter Cartridge

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

    As Low As $22.00 Per Filter

  8. EPM-20 Pentek Whole House Water Filter

    EPM-20 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $12.75 Per Filter

  9. Pentek EPM-BB Replacement Water Filter Cartridge

    EPM-BB Pentek Replacement Filter Cartridge

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

    As Low As $23.00 Per Filter

  10. P1 Pentek 10 x 2.5-inch Whole House Sediment Water Filter Replacement

    P1 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More

    As Low As $5.00 Per Filter

  11. EP-5 Pentek Replacement Filter Cartridge

    EP-5 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 5-inch x 2.5-inch water filter cartridges Learn More
    $6.99
  12. DW-200-R American Plumber Undersink Filter Replacement Cartridge

    DW-200-R American Plumber Undersink Filter Replacement Cartridge

    Fits Cuno AP-200 and PurWater PW-200 housings Learn More
    $18.99 Retail Price:  $21.15
  13. RWC-5 American Plumber Undersink Filter Replacement Cartridge

    RWC-5 American Plumber Undersink Filter Replacement Cartridge

    Fits most standard size water filter housings Learn More
  14. 3M Aqua-Pure AP200 Under Sink Water Filter
  15. 3M Aqua-Pure AP217 Under Sink Water Filter

    AP217 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
    $36.99
  16. 3M Aqua-Pure AP517 Water Filter Replacement Cartridge

    AP517 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
    $66.99 Retail Price:  $70.14
  17. C-CS-FF 3M Aqua-Pure Undersink Water Filter

    C-CS-FF 3M Aqua-Pure Undersink Water Filter Cartridge

    Fits the 3M Aqua-Pure Easy Full Flow Drinking Water Filtration System Learn More
    $43.99 Retail Price:  $48.06
  18. ISH-100 Culligan Level 2 Inline Shower Filter for 1/2 inch thread Shower Heads

    ISH-100 Culligan Level 2 Inline Shower Filter for 1/2 inch thread Shower Heads

    Fits any standard 1/2-inch threaded shower arm Learn More
    $24.99 Retail Price:  $27.34
  19. ISH-200 Culligan Inline Shower Filter - Chrome

    ISH-200 Culligan Inline Shower Filter - Chrome

    Fits any 1/2-inch thread shower heads Learn More
    $30.99 Retail Price:  $32.19
  20. RDSH-C115 Culligan Showerhead

    RDSH-C115 Culligan Showerhead

    Fits any 1/2-inch thread shower heads Learn More
    $38.99 Retail Price:  $48.98
  21. RFC-BBS-D Culligan Level 4 Whole House Filter Replacement Cartridge

    RFC-BBS-D Culligan Level 4 Whole House Filter Replacement Cartridge

    Fits Culligan HD-950, and any brand of whole house water filter system that uses standard 9 3/4 x 4 1/2 filter cartridges Learn More
    $28.99 Retail Price:  $34.60
  22. RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge

    RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge

    Fits Culligan Fulflo, WC12, LCA, WS-12, and any brand of water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99 Retail Price:  $17.24
  23. CFS117-S Cuno Whole House Filter Replacement Cartridge

    CFS117-S Cuno 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
    $37.99 Retail Price:  $40.24
  24. HF40-S Cuno Whole House Filter Replacement Cartridge

    HF40-S 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
    $105.99 Retail Price:  $123.04
  25. HF45-S Cuno Whole House Filter Replacement Cartridge

    HF45-S 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
    $103.99 Retail Price:  $120.39

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