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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.

800 Products found

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  1. Tier1 RO5 Replacement Filter Bundle 5-Pack

    Tier1 RO5 Replacement Filter Bundle 5-Pack

    Price $61.95
  2. Tier1 RO5 Replacement Filter Bundle 4-Pack

    Tier1 RO5 Replacement Filter Bundle 4-Pack

    Price $35.99
  3. 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%
    Free Shipping
  4. Pentair GRO-75EN TLC Encapsulated Membrane

    Pentair GRO-75EN TLC Encapsulated Membrane

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

    Pentair GRO-50EN TLC Encapsulated Membrane

    Price $93.99 List Price Price $134.99 Save 30%
    Free Shipping
  6. Everpure H-300 Comparable Filter System by Tier1

    Everpure H-300 Comparable Filter System by Tier1

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

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

    Price $17.99 List Price Price $25.99 Save 30%
  8. Replacement Media for Tier1Essential Certified Series Whole House Water Filtration System For Chlorine, Taste & Odor Reduction

    Replacement Media for Tier1Essential Certified Series Whole House Water Filtration System For Chlorine, Taste & Odor Reduction

    Price $89.99
    Free Shipping
  9. 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%
  10. Doulton/British Berkefeld 2.24 Gallon Stainless Steel Gravity-Fed Countertop System with ATC Purification Candle Filters

    Doulton/British Berkefeld 2.24 Gallon Stainless Steel Gravity-Fed Countertop System with ATC Purification Candle Filters

    Price $174.99 List Price Price $249.99 Save 30%
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  11. Kanrel Glass Water Bottle with Silicone Sleeve 20 oz - Purple

    KAN20PURP Kanrel 20 oz. Glass Water Bottle (Purple)

    Price $15.99 List Price Price $22.99 Save 30%
  12. PENTEK-CFB-30 Carbon Block Replacement Filter Cartridge

    PENTEK-CFB-30 Carbon Block Replacement Filter Cartridge

    Price $33.99 List Price Price $48.56 Save 30%

800 Products found

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Shopping Options
Category
  1. Undersink Water Filters & Systems 91 item
  2. Inline Water Filters 105 item
  3. Reverse Osmosis Water Filter Replacement Cartridges and Kits 137 item
  4. Commercial Grade Water Filters & Systems 195 item
  5. Countertop Water Filter Systems 21 item
  6. Water Filter Pitchers & Dispensers 26 item
  7. Camping Water Filters & Systems 20 item
  8. Shower Water Filters & Filter Systems 46 item
  9. Household Filters 47 item
Brand
  1. 3M 8 item
  2. American Hydro Systems 1 item
  3. American Plumber 6 item
  4. Aqua Flo 3 item
  5. Aquapatrol 1 item
  6. Aqua-Pure 6 item
  7. Aries 6 item
  8. Axeon 1 item
  9. BevGuard 5 item
  10. Brita 2 item
  11. Brondell 3 item
  12. Clairify 2 item
  13. Claris 1 item
  14. Crystal Quest 29 item
  15. Culligan 47 item
  16. Cuno 3 item
  17. Daewoo 1 item
  18. Desal 1 item
  19. Doulton 35 item
  20. DuPont 13 item
  21. Everpure 33 item
  22. Filtrete 5 item
  23. Flojet 1 item
  24. GE 10 item
  25. H2O International 2 item
  26. Halsey Taylor 1 item
  27. Harmsco 11 item
  28. Honeywell 2 item
  29. Hoshizaki 1 item
  30. Hydrologic 14 item
  31. Hydronix 20 item
  32. Hydrotech 13 item
  33. Hytrex 10 item
  34. Ice-O-Matic 2 item
  35. Inline Water Filters 3 item
  36. Insinkerator 1 item
  37. Kanrel 1 item
  38. Katadyn 9 item
  39. Klean Kanteen 4 item
  40. KX Matrikx 3 item
  41. Liquatec 1 item
  42. Manitowoc 3 item
  43. GE Merlin 4 item
  44. Microline 5 item
  45. OmniFilter 4 item
  46. Omnipure 94 item
  47. Pentair 2 item
  48. Pentek 113 item
  49. PetSafe 1 item
  50. Pioneer 2 item
  51. PuROLine 1 item
  52. PuROTwist 5 item
  53. Purtrex 11 item
  54. QMP 1 item
  55. Rainshow'r 12 item
  56. Rusco 20 item
  57. Seychelle 3 item
  58. Sprite 14 item
  59. SteriPEN 1 item
  60. Tier1 128 item
  61. Valueline 1 item
  62. Viqua 45 item
  63. Water Factory Systems 3 item
  64. Water Sentinel 3 item
  65. Watts 11 item
  66. Whirlpool 5 item
  67. ZeroWater 11 item
Primary Filter Media
  1. Activated Carbon Block 130 item
  2. Activated Carbon w Ion Exchange Resin 1 item
  3. Anion Resin 1 item
  4. Arsenic Selective Resin 1 item
  5. Carbon Block 7 item
  6. Carbon Wrapped 11 item
  7. Carbon-Impregnated Fabric 1 item
  8. Cellulose 1 item
  9. Ceramic with Carbon 13 item
  10. Eagle Redox Alloy 1 item
  11. Fine Mesh Pre-Resin Fluoride Removal Media 1 item
  12. Granular Activated Carbon 118 item
  13. Hexametaphosphate Crystals 1 item
  14. Ion Exchange Resin 23 item
  15. Nylon Monofilament 1 item
  16. Nylon Monofilament Mesh 5 item
  17. Permanganate Treated Zeolite 1 item
  18. Phosphate Crystal 3 item
  19. Pleated Fabric 6 item
  20. Pleated Polyester 10 item
  21. Polyester 13 item
  22. Polypropylene 90 item
  23. Scale Reduction media 7 item
  24. Semi-Permeable Membrane 20 item
  25. Sintered Ceramic 12 item
  26. Stainless Steel 8 item
Price
  1. $0.00 - $999.99 788 item
  2. $1,000.00 and above 15 item
Fitting Type
  1. BSP 1 item
  2. Compression 3 item
  3. FNPT 19 item
  4. FPT 43 item
  5. GHT 3 item
  6. MNPT 3 item
  7. MPT 13 item
  8. NPT 50 item
  9. Push In 5 item
  10. Quick-Change 7 item
  11. Quick Connect 58 item
Fitting Size (inches)
  1. 1/8 inch 2 item
  2. 1/4 inch 88 item
  3. 3/8 inch 45 item
  4. 1/2 inch 13 item
  5. 3/4 inch 31 item
  6. 1 inch 17 item
  7. 1-1/16 inches 3 item
  8. 1-1/2 inches 13 item
  9. 2 inches 9 item
Advertised Size (in)
  1. 5 x 2-1/2 10 item
  2. 6 x 2-1/2 3 item
  3. 6 x 3 2 item
  4. 7 x 2 1 item
  5. 8 x 2-1/2 6 item
  6. 9-3/4 x 2-1/2 1 item
  7. 9-3/4 x 2-3/4 3 item
  8. 10 x 2 8 item
  9. 10 x 2-1/2 94 item
  10. 10 x 3-1/2 2 item
  11. 10 x 4-1/2 24 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 23 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 5 item
  22. 14 x 3-1/2 1 item
  23. 15 x 3-1/2 2 item
  24. 18 x 4 1 item
  25. 18-1/4 x 7-1/4 1 item
  26. 20 x 2-1/2 28 item
  27. 20 x 4-1/2 34 item
  28. 23 x 8 1 item
  29. 29 x 10 1 item
  30. 30 x 2-1/2 9 item
  31. 31-3/4 x 7-1/4 1 item
  32. 32 x 7 1 item
  33. 40 x 2-1/2 5 item
Micron Rating (Nominal)
  1. 0⋅1 4 item
  2. 0⋅2 6 item
  3. 0⋅3 1 item
  4. 0.5 83 item
  5. 1 75 item
  6. 3 2 item
  7. 5 135 item
  8. 10 32 item
  9. 15 2 item
  10. 20 13 item
  11. 25 25 item
  12. 30 13 item
  13. 40 1 item
  14. 50 13 item
  15. 75 1 item
  16. 100 6 item
  17. 200 2 item
  18. 254 1 item
  19. 400 1 item
  20. 800 2 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 8 item
  2. 2 months 21 item
  3. 3 months 45 item
  4. 4 months 5 item
  5. 5 months 3 item
  6. 6 months 267 item
  7. 9 months 3 item
  8. 12 months 146 item
  9. 24 months 24 item
  10. 36 months 3 item
  11. 48 months 1 item
  12. 60 months 1 item
  13. 120 months 7 item
Filter Life (gallons)
  1. 0 - 100 22 item
  2. 100 - 250 17 item
  3. 250 - 500 23 item
  4. 500 - 1,000 44 item
  5. 1,000 - 2,500 114 item
  6. 2,500 - 5,000 61 item
  7. 5,000 - 10,000 24 item
  8. 10,000 - 13,000 3 item
  9. 10,000 - 25,000 62 item
  10. 25,000 - 50,000 13 item
  11. 50,000 and up 9 item