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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. 155014-43 Pentek Comparable Whole House Sediment Water Filter by Tier1

    155014-43 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More
    $4.99
  2. AP110 Aquapure Comparable Whole House Sediment Water Filter by Tier1

    AP110 Aquapure Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More
    $8.99 Retail Price:  $14.99
  3. FXUSC GE Comparable Whole House Sediment Water Filter 2-Pack by Tier1

    FXUSC GE Comparable Whole House Sediment Water Filter by Tier1 (2-Pack)

    Fits most standard 10 x 2.5-inch housings Learn More
    $9.99 Retail Price:  $12.34
  4. CW-F-D Culligan Comparable Whole House Water Filter 2-Pack by Tier1
  5. CW-MF Pentek Comparable Whole House Sediment Water Filter by Tier1

    CW-MF Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More
    $5.99 Retail Price:  $9.99
  6. CW-50 Pentek Comparable Whole House Sediment Water Filter by Tier1

    CW-50 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More
    $5.99 Retail Price:  $9.99
  7. S1A-D Culligan Comparable Whole House Sediment Water Filter 2-Pack by Tier1

    S1A-D Culligan Comparable Whole House Sediment Water Filter 2-Pack by Tier1

    Fits most standard 10 x 2.5-inch housings Learn More
    $6.99 Retail Price:  $12.99
  8. WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $28.99 Retail Price:  $37.99
  9. WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $27.99 Retail Price:  $37.99
  10. 36002017 PURA UV Lamp

    36002017 PURA UV Lamp

    Fits the Pentek UV-110 System Learn More
    $57.99 Retail Price:  $59.79
  11. 10-212 Pentek UV Lamp

    10-212 Pentek UV Lamp

    Fits the Pentek UVS-110 UltraViolet Filtration System Learn More
    $47.99 Retail Price:  $67.38
  12. 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
  13. 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
  14. 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
  15. 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    Fits any industry standard housing that accepts 2.5-inch by 10-inch replacement filters Learn More
    $7.99 Retail Price:  $11.49
  16. CFBC-20 Pentek Replacement Filter Cartridge

    CFBC-20 Pentek Replacement Water Filter Cartridge

    Fits into most standard water filtration system housings that accept 20-inch x 2.5-inch cartridges Learn More
    $23.49 Retail Price:  $29.31
  17. EPM-BB Pentek Replacement 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
    $27.99 Retail Price:  $34.49
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More
    $23.99 Retail Price:  $31.84
  25. P-250A Pentek Undersink Filter Set

    P-250A Pentek Undersink Filter Set

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More
    $23.99 Retail Price:  $31.27

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