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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.

447 Products found

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  1. Inline Remineralization Cartridge by Tier1

    Inline Remineralization Cartridge by Tier1

    Price $22.99 List Price Price $32.99 Save 30%
  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. W9120133 British Berkefeld 7 Inch Ultra Fluoride Imperial Gravity Filter

    W9120133 British Berkefeld 7 Inch Ultra Fluoride Imperial Gravity Filter

    Price $39.95 List Price Price $56.99 Save 29%
    Free Shipping
  4. Tier1 RO5 Replacement Filter Bundle 5-Pack

    Tier1 RO5 Replacement Filter Bundle 5-Pack

    Price $49.99 List Price Price $71.99 Save 30%
    Free Shipping
  5. Tier1 RO5 Replacement Filter Bundle 4-Pack

    Tier1 RO5 Replacement Filter Bundle 4-Pack

    Price $30.99 List Price Price $43.99 Save 29%
  6. 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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  7. 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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  8. 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%
  9. 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 $179.95 List Price Price $256.99 Save 29%
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  10. PENTEK-CFB-30 Carbon Block Replacement Filter Cartridge

    PENTEK-CFB-30 Carbon Block Replacement Filter Cartridge

    Price $89.99 List Price Price $128.99 Save 30%
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  11. RO-132-W14 White 3.2 Gallon Reverse Osmosis System Bladder Tank by Tier1 (With Stand)

    RO-132-W14 White 3.2 Gallon Capacity Reverse Osmosis System Bladder Tank by Tier1

    Price $68.99 List Price Price $98.99 Save 30%
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  12. P1 Pentek Comparable Whole House Sediment Water Filter by Tier1

    P1 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Price $4.99 List Price Price $6.99 Save 28%

447 Products found

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Shopping Options
Category
  1. Undersink Water Filters & Systems 62 item
  2. Inline Water Filters 57 item
  3. Reverse Osmosis Water Filter Replacement Cartridges and Kits 83 item
  4. Commercial Grade Water Filters & Systems 85 item
  5. Countertop Water Filter Systems 14 item
  6. Water Filter Pitchers & Dispensers 14 item
  7. Camping Water Filters & Systems 10 item
  8. Shower Water Filters & Filter Systems 13 item
  9. Household Filters 19 item
Brand
  1. 3M 4 item
  2. American Hydro Systems 1 item
  3. American Plumber 5 item
  4. Aqua Flo 2 item
  5. Aquapatrol 1 item
  6. Aqua-Pure 5 item
  7. Aries 3 item
  8. BevGuard 1 item
  9. Claris 1 item
  10. Crystal Quest 2 item
  11. Culligan 33 item
  12. Cuno 2 item
  13. Doulton 26 item
  14. DuPont 3 item
  15. Everpure 11 item
  16. Filtrete 3 item
  17. GE 9 item
  18. Harmsco 4 item
  19. Hoshizaki 1 item
  20. Hydrologic 7 item
  21. Hydronix 10 item
  22. Hydrotech 8 item
  23. Hytrex 3 item
  24. Inline Water Filters 2 item
  25. Insinkerator 1 item
  26. Katadyn 2 item
  27. Klean Kanteen 1 item
  28. KX Matrikx 2 item
  29. Liquatec 1 item
  30. Manitowoc 3 item
  31. GE Merlin 3 item
  32. Microline 3 item
  33. OmniFilter 3 item
  34. Omnipure 37 item
  35. Pentek 78 item
  36. Pioneer 2 item
  37. Pro Products 1 item
  38. PuROTwist 1 item
  39. Purtrex 6 item
  40. QMP 1 item
  41. Rainshow'r 4 item
  42. Rusco 7 item
  43. Sprite 4 item
  44. Tier1 108 item
  45. Viqua 39 item
  46. Water Factory Systems 1 item
  47. Watts 5 item
  48. Whirlpool 2 item
  49. ZeroWater 8 item
Primary Filter Media
  1. Activated Carbon Block 73 item
  2. Activated Carbon w Ion Exchange Resin 1 item
  3. Carbon Block 5 item
  4. Carbon Wrapped 11 item
  5. Ceramic with Carbon 11 item
  6. Granular Activated Carbon 72 item
  7. Hexametaphosphate Crystals 1 item
  8. Ion Exchange Resin 13 item
  9. Nylon Monofilament 1 item
  10. Nylon Monofilament Mesh 2 item
  11. Permanganate Treated Zeolite 1 item
  12. Phosphate Crystal 2 item
  13. Pleated Fabric 4 item
  14. Pleated Polyester 8 item
  15. Polyester 6 item
  16. Polypropylene 50 item
  17. Scale Reduction media 6 item
  18. Semi-Permeable Membrane 11 item
  19. Sintered Ceramic 5 item
  20. Stainless Steel 3 item
Price
  1. $0.00 - $999.99 446 item
  2. $1,000.00 and above 5 item
Fitting Type
  1. Compression 1 item
  2. FNPT 15 item
  3. FPT 16 item
  4. GHT 2 item
  5. MPT 7 item
  6. NPT 36 item
  7. Push In 3 item
  8. Quick-Change 5 item
  9. Quick Connect 35 item
Fitting Size (inches)
  1. 1/8 inch 2 item
  2. 1/4 inch 53 item
  3. 3/8 inch 20 item
  4. 1/2 inch 6 item
  5. 3/4 inch 21 item
  6. 1 inch 12 item
  7. 1-1/16 inches 2 item
  8. 1-1/2 inches 5 item
  9. 2 inches 2 item
Advertised Size (in)
  1. 5 x 2-1/2 10 item
  2. 6 x 3 2 item
  3. 7 x 2 2 item
  4. 8 x 2-1/2 3 item
  5. 9-3/4 x 2-1/2 1 item
  6. 9-3/4 x 2-3/4 2 item
  7. 10 x 2 8 item
  8. 10 x 2-1/2 62 item
  9. 10 x 3-1/2 1 item
  10. 10 x 4-1/2 15 item
  11. 10 x 5 1 item
  12. 10-1/4 x 2-1/2 2 item
  13. 10-5/16 x 2-1/8 1 item
  14. 10-3/4 x 2-3/4 1 item
  15. 12 x 2-1/2 7 item
  16. 12-1/32 x 4-5/32 1 item
  17. 12-3/4 x 3 1 item
  18. 14 x 2-1/2 2 item
  19. 14 x 3-1/2 1 item
  20. 15 x 3-1/2 1 item
  21. 18-1/4 x 7-1/4 1 item
  22. 20 x 2-1/2 20 item
  23. 20 x 4-1/2 24 item
  24. 30 x 2-1/2 2 item
  25. 31-3/4 x 7-1/4 1 item
  26. 40 x 2-1/2 1 item
Micron Rating (Nominal)
  1. 0⋅1 2 item
  2. 0⋅3 1 item
  3. 0.5 62 item
  4. 1 33 item
  5. 3 2 item
  6. 5 88 item
  7. 10 24 item
  8. 15 1 item
  9. 20 8 item
  10. 25 14 item
  11. 30 10 item
  12. 50 4 item
  13. 100 2 item
  14. 200 1 item
  15. 400 1 item
  16. 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 4 item
  2. 2 months 12 item
  3. 3 months 30 item
  4. 4 months 3 item
  5. 5 months 1 item
  6. 6 months 171 item
  7. 9 months 1 item
  8. 12 months 69 item
  9. 24 months 13 item
  10. 36 months 1 item
  11. 60 months 1 item
  12. 120 months 4 item
Filter Life (gallons)
  1. 0 - 100 11 item
  2. 100 - 250 8 item
  3. 250 - 500 19 item
  4. 500 - 1,000 30 item
  5. 1,000 - 2,500 64 item
  6. 2,500 - 5,000 30 item
  7. 5,000 - 10,000 18 item
  8. 10,000 - 13,000 1 item
  9. 10,000 - 25,000 29 item
  10. 25,000 - 50,000 8 item
  11. 50,000 and up 6 item