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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.

608 Products found

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  1. Doulton W9380002 Three Stage HIP3 Undersink Water Filtration System with 3x Doulton Water Filters

    Doulton W9380002 Three Stage HIP3 Undersink Water Filtration System with 3x Doulton Water Filters

    Price $247.99 List Price Price $354.99 Save 30%
    Free Shipping
  2. Doulton W9361122 Gravity Water Filter System Stainless Steel with 4x ATC Super Sterasyl Candle Filters

    Doulton W9361122 Gravity Water Filter System Stainless Steel with 4x ATC Super Sterasyl Candle Filters

    Price $252.99 List Price Price $361.99 Save 30%
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  3. Doulton W9361122 Gravity Water Filter System Stainless Steel with 4x Super Sterasyl Candle Filters

    Doulton W9361122 Gravity Water Filter System Stainless Steel with 4x Super Sterasyl Candle Filters

    Price $230.99 List Price Price $329.99 Save 30%
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  4. W9120133 British Berkefeld 7 Inch Ultra Fluoride Imperial Gravity Filter

    W9120133 British Berkefeld 7 Inch Ultra Fluoride Imperial Gravity Filter

    Price $82.37 List Price Price $117.99 Save 30%
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  5. Tier1 RO5 Replacement Filter Bundle 5-Pack

    Tier1 RO5 Replacement Filter Bundle 5-Pack

    Price $1,000.00
    Free Shipping
  6. Tier1 RO5 Replacement Filter Bundle 4-Pack

    Tier1 RO5 Replacement Filter Bundle 4-Pack

    Price $35.99 List Price Price $50.99 Save 29%
  7. Doulton W9380003 Housing + W9125010 10" Limescale Reduction Cartridge

    Doulton W9380003 Housing + W9125010 10" Limescale Reduction Cartridge

    Price $207.99 List Price Price $297.99 Save 30%
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  8. Pentair GRO-75EN TLC Encapsulated Membrane

    Pentair GRO-75EN TLC Encapsulated Membrane

    Price $99.99 List Price Price $142.99 Save 30%
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  9. Pentair GRO-50EN TLC Encapsulated Membrane

    Pentair GRO-50EN TLC Encapsulated Membrane

    Price $93.99 List Price Price $134.99 Save 30%
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  10. Aqua Flo AQUA-FLO-1812-50 Reverse Osmosis Membrane Water Filter

    Aqua Flo AQUA-FLO-1812-50 Reverse Osmosis Membrane Water Filter

    Price $29.99 List Price Price $42.99 Save 30%
  11. Replacement Chlorine, Taste & Odor Reduction Media for Tier1 Eco and Precision Series Whole House Water Filtration Systems

    Replacement Chlorine, Taste & Odor Reduction Media for Tier1 Eco and Precision Series Whole House Water Filtration Systems

    Price $89.99 List Price Price $128.99 Save 30%
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  12. Alkaline Water Pitcher and Alkaline Pitcher Replacement Filters (3-Pack) Kit by Tier1

    Alkaline Water Pitcher and Alkaline Pitcher Replacement Filters (3-Pack) Kit by Tier1

    Price $36.99 List Price Price $52.99 Save 30%

608 Products found

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Shopping Options
Category
  1. Undersink Water Filters & Systems 81 item
  2. Inline Water Filters 83 item
  3. Reverse Osmosis Water Filter Replacement Cartridges and Kits 108 item
  4. Commercial Grade Water Filters & Systems 135 item
  5. Countertop Water Filter Systems 16 item
  6. Water Filter Pitchers & Dispensers 19 item
  7. Camping Water Filters & Systems 15 item
  8. Shower Water Filters & Filter Systems 25 item
  9. Household Filters 27 item
Brand
  1. 3M 7 item
  2. American Hydro Systems 1 item
  3. American Plumber 5 item
  4. Aqua Flo 3 item
  5. Aquapatrol 1 item
  6. Aqua-Pure 6 item
  7. Aries 5 item
  8. BevGuard 2 item
  9. Brondell 1 item
  10. Clairify 1 item
  11. Claris 1 item
  12. Crystal Quest 2 item
  13. Culligan 44 item
  14. Cuno 3 item
  15. Doulton 33 item
  16. DuPont 8 item
  17. Everpure 20 item
  18. Filtrete 4 item
  19. GE 9 item
  20. Halsey Taylor 1 item
  21. Harmsco 6 item
  22. Hoshizaki 1 item
  23. Hydrologic 13 item
  24. Hydronix 15 item
  25. Hydrotech 11 item
  26. Hytrex 6 item
  27. Inline Water Filters 3 item
  28. Insinkerator 1 item
  29. Katadyn 3 item
  30. Klean Kanteen 1 item
  31. KX Matrikx 2 item
  32. Liquatec 1 item
  33. Manitowoc 3 item
  34. GE Merlin 3 item
  35. Microline 4 item
  36. OmniFilter 3 item
  37. Omnipure 73 item
  38. Pentair 2 item
  39. Pentek 99 item
  40. PetSafe 1 item
  41. Pioneer 2 item
  42. Pro Products 1 item
  43. PuROLine 1 item
  44. PuROTwist 2 item
  45. Purtrex 7 item
  46. QMP 1 item
  47. Rainshow'r 10 item
  48. Rusco 10 item
  49. Seychelle 1 item
  50. Sprite 9 item
  51. SteriPEN 1 item
  52. Tier1 117 item
  53. Viqua 40 item
  54. Water Factory Systems 2 item
  55. Watts 7 item
  56. Whirlpool 3 item
  57. ZeroWater 8 item
Primary Filter Media
  1. Activated Carbon Block 107 item
  2. Activated Carbon w Ion Exchange Resin 1 item
  3. Carbon Block 8 item
  4. Carbon Wrapped 11 item
  5. Carbon-Impregnated Fabric 1 item
  6. Ceramic with Carbon 13 item
  7. Granular Activated Carbon 94 item
  8. Hexametaphosphate Crystals 1 item
  9. Ion Exchange Resin 14 item
  10. Nylon Monofilament 1 item
  11. Nylon Monofilament Mesh 2 item
  12. Permanganate Treated Zeolite 1 item
  13. Phosphate Crystal 3 item
  14. Pleated Fabric 5 item
  15. Pleated Polyester 8 item
  16. Polyester 10 item
  17. Polypropylene 68 item
  18. Scale Reduction media 6 item
  19. Semi-Permeable Membrane 15 item
  20. Sintered Ceramic 6 item
  21. Stainless Steel 3 item
Price
  1. $0.00 - $999.99 602 item
  2. $1,000.00 and above 9 item
Fitting Type
  1. Compression 1 item
  2. FNPT 16 item
  3. FPT 27 item
  4. GHT 2 item
  5. MPT 9 item
  6. NPT 44 item
  7. Push In 5 item
  8. Quick-Change 7 item
  9. Quick Connect 51 item
Fitting Size (inches)
  1. 1/8 inch 2 item
  2. 1/4 inch 76 item
  3. 3/8 inch 35 item
  4. 1/2 inch 8 item
  5. 3/4 inch 24 item
  6. 1 inch 15 item
  7. 1-1/16 inches 2 item
  8. 1-1/2 inches 9 item
  9. 2 inches 2 item
Advertised Size (in)
  1. 5 x 2-1/2 10 item
  2. 6 x 2-1/2 1 item
  3. 6 x 3 2 item
  4. 7 x 2 2 item
  5. 8 x 2-1/2 4 item
  6. 9-3/4 x 2-1/2 1 item
  7. 9-3/4 x 2-3/4 2 item
  8. 10 x 2 9 item
  9. 10 x 2-1/2 79 item
  10. 10 x 3-1/2 2 item
  11. 10 x 4-1/2 18 item
  12. 10 x 5 1 item
  13. 10-1/4 x 2-1/2 2 item
  14. 10-5/16 x 2-1/8 1 item
  15. 10-1/2 x 2-3/4 1 item
  16. 10-3/4 x 2-3/4 1 item
  17. 12 x 2-1/2 16 item
  18. 12-1/32 x 4-5/32 1 item
  19. 12 x 3-1/2 1 item
  20. 12-3/4 x 3 1 item
  21. 14 x 2-1/2 3 item
  22. 14 x 3-1/2 1 item
  23. 15 x 3-1/2 2 item
  24. 18-1/4 x 7-1/4 1 item
  25. 20 x 2-1/2 22 item
  26. 20 x 4-1/2 28 item
  27. 30 x 2-1/2 4 item
  28. 31-3/4 x 7-1/4 1 item
  29. 32 x 7 1 item
  30. 40 x 2-1/2 3 item
Micron Rating (Nominal)
  1. 0⋅1 3 item
  2. 0⋅2 1 item
  3. 0⋅3 1 item
  4. 0.5 70 item
  5. 1 59 item
  6. 3 2 item
  7. 5 112 item
  8. 10 28 item
  9. 15 2 item
  10. 20 9 item
  11. 25 20 item
  12. 30 12 item
  13. 40 1 item
  14. 50 7 item
  15. 75 1 item
  16. 100 3 item
  17. 200 1 item
  18. 254 1 item
  19. 400 1 item
  20. 800 1 item
Filter Diameter (inches)
  1. 8 - 9 1 item
Filter Length (inches)
  1. 21 - 24 1 item
Pool/Spa Manufacturer
  1. Tier1 1 item
Filter Life (months)
  1. 1 month 5 item
  2. 2 months 17 item
  3. 3 months 39 item
  4. 4 months 5 item
  5. 5 months 2 item
  6. 6 months 218 item
  7. 9 months 3 item
  8. 12 months 109 item
  9. 24 months 18 item
  10. 36 months 2 item
  11. 60 months 1 item
  12. 120 months 4 item
Filter Life (gallons)
  1. 0 - 100 16 item
  2. 100 - 250 13 item
  3. 250 - 500 23 item
  4. 500 - 1,000 41 item
  5. 1,000 - 2,500 91 item
  6. 2,500 - 5,000 49 item
  7. 5,000 - 10,000 20 item
  8. 10,000 - 13,000 2 item
  9. 10,000 - 25,000 44 item
  10. 25,000 - 50,000 8 item
  11. 50,000 and up 7 item