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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.

Items 1 to 25 of 264 total

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  1. 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
  2. W20CLA American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W20CLA American Plumber Whole House Sediment Water Filter Cartridge (2-Pack)

    Built to fit into American Plumber W34-PR, WC34-PR and WVC34 whole house water filtration systems, in addition to most standard size water filtration system housings Learn More
    $12.99 Retail Price:  $15.34
  3. W25P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W25P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $13.99 Retail Price:  $16.34
  4. W30PE American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W30PE American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $17.99 Retail Price:  $18.04
  5. W30W American Plumber Whole House Sediment Water Filter Cartridge (2-Pack)

    W30W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $13.99 Retail Price:  $16.34
  6. W50PE American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W50PE American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $16.99 Retail Price:  $18.39
  7. W50W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W50W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $14.99 Retail Price:  $17.34
  8. W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $21.99 Retail Price:  $24.34
  9. W5P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W5P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $13.99 Retail Price:  $16.34
  10. W5W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W5W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $14.99 Retail Price:  $17.34
  11. WCC American Plumber Undersink Filter Replacement Cartridge

    WCC American Plumber Undersink Filter Replacement Cartridge

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $19.99 Retail Price:  $26.44
  12. WPD-110 American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    WPD-110 American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR, WVC34, WH34, ST-1, ST-2, ST-3 and most standard size water filter housings Learn More
    $15.99 Retail Price:  $18.34
  13. WROM-230T American Plumber Reverse Osmosis Replacement Membrane

    WROM-230T American Plumber Reverse Osmosis Replacement Membrane

    Fits American Plumber WRO-3000 Reverse Osmosis System Learn More
    $90.99 Retail Price:  $112.69
  14. WROM-230TN American Plumber Reverse Osmosis Replacement Membrane

    WROM-230TN American Plumber Reverse Osmosis Replacement Membrane

    Fits American Plumber WRO-3500 Reverse Osmosis System Learn More
    $89.99 Retail Price:  $104.65
  15. WROR American Plumber Reverse Osmosis Replacement Filter Kit

    WROR American Plumber Reverse Osmosis Replacement Filter Kit

    Fits American Plumber WRO-3500 and WRO-3000 Reverse Osmosis Systems Learn More
    $43.99 Retail Price:  $51.74
  16. 3M Aqua-Pure AP1001 Whole House Water Filter Cartridge

    AP1001 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
    $31.99 Retail Price:  $40.24
  17. 3M Aqua-Pure AP1003 Water Filter Replacement Cartridge (2-Pack)

    AP1003 3M Aqua-Pure Whole House Filter Replacement Cartridge (2-Pack)

    Fits 3M Aqua-Pure whole house water filter systems Learn More
    $56.99 Retail Price:  $71.29
  18. 3M Aqua-Pure AP110 Whole House Water Filter Cartridge

    AP110 3M Aqua-Pure 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
    $12.99 Retail Price:  $13.79
  19. AP111 3M Aqua-Pure Whole House Filter Replacement Cartridge

    AP111 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
  20. 3M Aqua-Pure AP117 Whole House Water Filter Cartridge

    AP117 3M Aqua-Pure 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
    $28.99 Retail Price:  $36.67
  21. AP117RO 3M Aqua-Pure Reverse Osmosis Filter

    AP117RO 3M Aqua-Pure Reverse Osmosis Filter

    For use in 3M Aqua-Pure reverse osmosis water filtration systems Learn More
    $23.99 Retail Price:  $30.23
  22. 3M Aqua-Pure AP124 Whole House Water Filter Cartridge

    AP124 3M Aqua-Pure 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
    $13.99 Retail Price:  $17.24
  23. 3M Aqua-Pure AP420 Water Filter Replacement Cartridge

    AP420 3M Aqua-Pure Whole House Filter Replacement Cartridge (2-Pack)

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $94.99 Retail Price:  $113.84
  24. 3M Aqua-Pure APS117 Whole House Water Filter Replacement Cartridge

    APS117 3M Aqua-Pure 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
    $34.99 Retail Price:  $40.81
  25. C-CS-S 3M Aqua-Pure Undersink Water Filter

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

    Fits the 3M Aqua-Pure Easy CS-S Water Filtration System Learn More
    $37.99 Retail Price:  $42.54

Items 1 to 25 of 264 total

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