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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. 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
  2. TFM-24 Desal Reverse Osmosis Membrane

    TFM-24 Desal Reverse Osmosis Membrane

    Fits select reverse osmosis systems Learn More
    $24.99 Retail Price:  $47.14
  3. EPM-10 Pentek Undersink Filter Replacement Cartridge

    EPM-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
    $9.99 Retail Price:  $10.57
  4. GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-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
    $12.99
  5. KO25G2S Pentek Polypropylene Bag Filter

    KO25G2S Pentek Polypropylene Bag Filters

    Fits Pentek Carbon Steel, Stainless Steel and Aluminum Housings that accept #2 filter bags Learn More
    $6.19 Retail Price:  $9.42
  6. KO25HE2 Pentek Polypropylene High Efficiency Bag Filter

    KO25HE2 Pentek Polypropylene High Efficiency Bag Filter

    Fits Pentek Carbon Steel, Stainless Steel and Aluminum Housings that accept #2 filter bags. Learn More
    $16.99 Retail Price:  $19.34
  7. KO50G2S Pentek Polypropylene Bag Filter

    KO50G2S Pentek Polypropylene Bag Filter

    Fits Pentek Carbon Steel, Stainless Steel and Aluminum Housings that accept #2 filter bags. Learn More
    $6.19 Retail Price:  $9.42
  8. KO50G4S Pentek Polypropylene Bag Filter

    KO50G4S Pentek Polypropylene Filter Bag

    Fits Pentek Carbon Steel, Stainless Steel and Aluminum Housings that accept #4 filter bags. Learn More
    $4.99 Retail Price:  $5.85
  9. KO5G3S Pentek Polypropylene Bag Filter

    KO5G3S Pentek Polypropylene Filter Bags

    Fits Pentek Carbon Steel, Stainless Steel and Aluminum Housings that accept #3 filter bags Learn More
    $4.99 Retail Price:  $7.00
  10. NCP-10 Pentek Undersink Filter Replacement Cartridge

    NCP-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
    $9.99 Retail Price:  $11.95
  11. OAC-20BB Pentek Oil Reduction Filter

    OAC-20BB Pentek Oil Reduction Water Filter

    Fits most Big Blue filtration system housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $73.99 Retail Price:  $85.20
  12. P1 Pentek Whole House Filter Replacement Cartridge

    P1 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $7.99
  13. P25 Pentek Whole House Replacement Sediment Filter Cartridge

    P25 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most housings that accept standard 10-inch x 2.5-inch water filter cartridges Learn More
    $7.99 Retail Price:  $9.19
  14. P25-20 Pentek Whole House Replacement Sediment Filter Cartridge

    P25-20 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More
    $10.99 Retail Price:  $13.34
  15. P5-20 Pentek Whole House Filter Replacement Cartridge

    P5-20 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $9.99 Retail Price:  $12.34
  16. PCC212 Pentek Replacement Filter Cartridge

    PCC212 Pentek Replacement Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $21.99 Retail Price:  $22.41
  17. PCC218 Pentek Replacement Filter Cartridge

    PCC218 Pentek Replacement Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $24.99 Retail Price:  $26.44
  18. PCF1-10MB Pentek Whole House Filter Replacement Cartridge

    PCF1-10MB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $25.99 Retail Price:  $30.69
  19. PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $42.99 Retail Price:  $49.67
  20. PD-1-20 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-1-20 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $10.99 Retail Price:  $11.72
  21. PD-1-40 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-1-40 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 40-inch x 2.5-inch water filter cartridges Learn More
    $18.99 Retail Price:  $20.00
  22. PD-1-934 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-1-934 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $7.99 Retail Price:  $8.15
  23. PD-10-20 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-10-20 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $12.99 Retail Price:  $15.34
  24. PD-10-934 Pentek Whole House Filter Replacement Cartridge

    PD-10-934 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 10-inch x 2 1/2-inch replacement filter cartridges Learn More
    $7.99 Retail Price:  $8.15
  25. PD-25-20 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-25-20 Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $12.99

Items 1 to 25 of 149 total

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