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Water 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.

115 Products found

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  1. Q5533 Omnipure Undersink Replacement Water Filter

    Q5533 Omnipure Undersink Replacement Water Filter

    Price $21.99 List Price Price $31.99 Save 31%
  2. 20 inch Slim Polypropylene Filter Housing with 5 Micron Carbon and Polyphosphate Water Softening Cartridge Kit by Tier1

    20 inch Slim Polypropylene Filter Housing with 5 Micron Carbon and Polyphosphate Water Softening Cartridge Kit by Tier1

    Price $70.99 List Price Price $101.99 Save 30%
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  3. 20 inch Slim Polypropylene Filter Housing with 10 Micron Carbon and Anti-scale Water Softening Cartridge Kit by Tier1

    20 inch Slim Polypropylene Filter Housing with 10 Micron Carbon and Anti-scale Water Softening Cartridge Kit by Tier1

    Price $81.99 List Price Price $117.99 Save 30%
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  4. US-DC2-R Culligan Direct Connect Advanced Replacement Filter

    US-DC2-R Culligan Direct Connect Advanced Replacement Filter

    Price $32.99 List Price Price $47.99 Save 31%
  5. 10 Micron Carbon and Anti-scale Water Softening Replacement Cartridge by Tier1

    10 Micron Carbon and Anti-scale Water Softening Replacement Cartridge by Tier1

    Price $28.99 List Price Price $41.99 Save 30%
  6. 5 Micron Carbon and Polyphosphate Whole House Softening Replacement Cartridge by Tier1

    5 Micron Carbon and Polyphosphate Whole House Softening Replacement Cartridge by Tier1

    Price $18.99 List Price Price $27.99 Save 32%
  7. 3MRO401-01 3M Under Sink Reverse Osmosis Water Filter System

    3MRO401-01 3M Under Sink Reverse Osmosis Water Filter System

    Price $573.99 List Price Price $819.99 Save 30%
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  8. 3MRO301 3M Under Sink Reverse Osmosis Water Filter System

    3MRO301 3M Under Sink Reverse Osmosis Water Filter System

    Price $510.99 List Price Price $729.99 Save 30%
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  9. FM-1500 Water Factory Systems Under Sink Drinking Water System

    FM-1500 Water Factory Systems Under Sink Drinking Water System

    Price $154.99 List Price Price $221.99 Save 30%
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  10. 10 x 2.5 Inch 10 Stage Countertop or Undersink Filter Cartridge Replacement by Tier1

    10 x 2.5 Inch 10 Stage Countertop or Undersink Filter Cartridge Replacement by Tier1

    Price $28.99 List Price Price $41.99 Save 30%
  11. EP-BB 155548-43 Pentek Carbon Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1

    EP-BB 155548-43 Pentek Carbon Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1

    Price $26.99 List Price Price $38.99 Save 30%
  12. 4-Stage Ultra-Filtration Hollow Fiber Drinking Water Filter System and Faucet by Tier1

    4-Stage Ultra-Filtration Hollow Fiber Drinking Water Filter System by Tier1 (Quick Change)

    Price $138.99 List Price Price $198.99 Save 30%
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115 Products found

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  1. Filter Life (gallons) 1,000 - 2,500
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Category
  1. Undersink Water Filters & Systems 27 item
  2. Inline Water Filters 46 item
  3. Reverse Osmosis Water Filter Replacement Cartridges and Kits 13 item
  4. Commercial Grade Water Filters & Systems 24 item
  5. Countertop Water Filter Systems 1 item
  6. Water Filter Pitchers & Dispensers 2 item
  7. Camping Water Filters & Systems 2 item
  8. Household Filters 2 item
Brand
  1. 3M 2 item
  2. American Plumber 1 item
  3. Aqua-Pure 3 item
  4. Aries 2 item
  5. Crystal Quest 6 item
  6. Culligan 4 item
  7. Cuno 2 item
  8. Doulton 2 item
  9. Everpure 6 item
  10. Filtrete 4 item
  11. GE 1 item
  12. Hydrologic 1 item
  13. Hydronix 6 item
  14. OmniFilter 2 item
  15. Omnipure 45 item
  16. Pentek 9 item
  17. Tier1 15 item
  18. Water Factory Systems 2 item
  19. Watts 3 item
  20. Whirlpool 2 item
Primary Filter Media
  1. Activated Carbon Block 31 item
  2. Carbon Block 2 item
  3. Carbon Wrapped 1 item
  4. Ceramic with Carbon 2 item
  5. Granular Activated Carbon 49 item
  6. Ion Exchange Resin 2 item
  7. Polypropylene 1 item
  8. Scale Reduction media 1 item
Price
  1. $0.00 - $99.99 106 item
  2. $100.00 - $199.99 6 item
  3. $300.00 - $399.99 2 item
  4. $500.00 and above 2 item
Fitting Type
  1. FNPT 5 item
  2. FPT 8 item
  3. NPT 13 item
  4. Push In 1 item
  5. Quick-Change 6 item
  6. Quick Connect 23 item
Fitting Size (inches)
  1. 1/8 inch 1 item
  2. 1/4 inch 35 item
  3. 3/8 inch 14 item
  4. 3/4 inch 3 item
Advertised Size (in)
  1. 5 x 2-1/2 1 item
  2. 6 x 2-1/2 3 item
  3. 8 x 2-1/2 3 item
  4. 10 x 2 4 item
  5. 10 x 2-1/2 17 item
  6. 10 x 4-1/2 1 item
  7. 10 x 5 1 item
  8. 10-3/4 x 2-3/4 1 item
  9. 12 x 2-1/2 5 item
  10. 14 x 2-1/2 2 item
  11. 20 x 2-1/2 4 item
Micron Rating (Nominal)
  1. 0⋅1 1 item
  2. 0.5 13 item
  3. 1 19 item
  4. 5 34 item
  5. 10 7 item
  6. 20 2 item
  7. 25 2 item
Filter Life (months)
  1. 3 months 2 item
  2. 6 months 53 item
  3. 9 months 2 item
  4. 12 months 51 item
  5. 24 months 1 item
  6. 36 months 1 item