Currency
USD - US Dollar
  • Sign In
  • Create an Account
Toggle Nav
My Cart
Search
Advanced Search
  • Compare Products
Menu
Account
Settings
Currency
USD - US Dollar

4.5" x 20" Big Blue Filters

Replacement Big Blue Whole House Water Filters

4.5" x 20" Filters fit Standard 20" Big Blue Housing

Don't see the bundle or Filters that you're looking for? Send us a message!

View as Grid List

45 Items

per page
Set Descending Direction
  1. 2 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    2 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    Special Price $64.99 Regular Price $79.99
    Add to Compare
  2. 20" Big Blue LimeScale Reducing Water Filter Cartridge 4.5" x 20" - SLOW PHOS | for Whole House Big Blue Housing Filtration Systems
    20" Big Blue LimeScale Reducing Water Filter Cartridge 4.5" x 20" - SLOW PHOS | for Whole House Big Blue Housing Filtration Systems
    Special Price $188.99 Regular Price $209.99
    Add to Compare
  3. 4 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    4 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    Special Price $132.99 Regular Price $160.99
    Add to Compare
  4. 4.5" x 20" Big Blue Refillable Birm Filter - for Iron and Manganese Reduction | Whole House Water Filter
    4.5" x 20" Big Blue Refillable Birm Filter - for Iron and Manganese Reduction | Whole House Water Filter
    Special Price $84.99 Regular Price $92.99
    Add to Compare
  5. 4.5" x 20" Big Blue Refillable Filter Cartridge - Catalytic Carbon/KDF 55 - Chloramine Removal
    4.5" x 20" Big Blue Refillable Filter Cartridge - Catalytic Carbon/KDF 55 - Chloramine Removal
    Special Price $84.99 Regular Price $96.99
    Add to Compare
  6. 4.5" x 20" Big Blue Refillable Filter Cartridge - GAC Coconut Shell Carbon + KDF 55 - Chlorine Removal
    4.5" x 20" Big Blue Refillable Filter Cartridge - GAC Coconut Shell Carbon + KDF 55 - Chlorine Removal
    Special Price $74.99 Regular Price $89.99
    Add to Compare
  7. 4.5" x 20" Big Blue Refillable Katalox Light Filter - for Manganese Reduction | Whole House Water Filter
    4.5" x 20" Big Blue Refillable Katalox Light Filter - for Manganese Reduction | Whole House Water Filter
    Special Price $99.99 Regular Price $109.99
    Add to Compare
  8. 4.5" x 20" Big Blue Refillable Water Filter Cartridge - GAC Coconut Shell Carbon + KDF 85: Removes Iron, Sulfur/Rotten Egg Smell
    4.5" x 20" Big Blue Refillable Water Filter Cartridge - GAC Coconut Shell Carbon + KDF 85: Removes Iron, Sulfur/Rotten Egg Smell
    Special Price $79.99 Regular Price $89.99
    Add to Compare
  9. 4.5" x 20" Big Blue Refillable Well Water Filter - for Iron, Sulfur and Chlorine Reduction | KDF 85 + KDF 55 + Activated Carbon
    4.5" x 20" Big Blue Refillable Well Water Filter - for Iron, Sulfur and Chlorine Reduction | KDF 85 + KDF 55 + Activated Carbon
    Special Price $98.99 Regular Price $107.99
    Add to Compare
  10. 4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - Catalytic Carbon
    4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - Catalytic Carbon
    Special Price $69.99 Regular Price $74.99
    Add to Compare
  11. 4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - GAC Carbon
    4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - GAC Carbon
    Special Price $49.99 Regular Price $54.99
    Add to Compare
  12. 4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - GAC Catalytic Carbon/Birm + KDF 85: Removes Iron, Manganese, Hydrogen Sulfide - Rotten Egg Smell
    4.5" x 20" Whole House Big Blue Refillable Water Filter Cartridge - GAC Catalytic Carbon/Birm + KDF 85: Removes Iron, Manganese, Hydrogen Sulfide - Rotten Egg Smell
    Special Price $89.99 Regular Price $99.99
    Add to Compare
  13. 6 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    6 Pack: Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" |10 Micron Nominal Filtration
    Special Price $198.99 Regular Price $229.99
    Add to Compare
  14. Anti- Scale Water Filter Cartridge for Big Blue Whole House Systems | 4.5" x 20" | TAC Technology
    Anti- Scale Water Filter Cartridge for Big Blue Whole House Systems | 4.5" x 20" | TAC Technology
    Special Price $189.99 Regular Price $199.99
    Add to Compare
  15. Big Big Whole House Filter Cartridges 4.5" x 20" - Sediment & GAC/KDF
    Big Big Whole House Filter Cartridges 4.5" x 20" - Sediment & GAC/KDF
    Special Price $104.99 Regular Price $119.99
    Add to Compare
  16. Big Big Whole House Filter Cartridges 4.5" x 20" (2) Sediment, GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (2) Sediment, GAC
    Special Price $57.99 Regular Price $69.99
    Add to Compare
  17. Big Big Whole House Filter Cartridges 4.5" x 20" (3) Pleated Sediment, Carbon Block, KDF 55 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (3) Pleated Sediment, Carbon Block, KDF 55 / GAC
    Special Price $143.99 Regular Price $154.99
    Add to Compare
  18. Big Big Whole House Filter Cartridges 4.5" x 20" (3) Pleated Sediment, Carbon Block, KDF 85 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (3) Pleated Sediment, Carbon Block, KDF 85 / GAC
    Special Price $145.99 Regular Price $156.99
    Add to Compare
  19. Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, GAC
    Special Price $99.99 Regular Price $109.99
    Add to Compare
  20. Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, KDF 55 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, KDF 55 / GAC
    Special Price $134.99 Regular Price $144.99
    Add to Compare
  21. Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, KDF 85 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20" (3) Sediment, Carbon Block, KDF 85 / GAC
    Special Price $136.99 Regular Price $144.99
    Add to Compare
  22. Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, GAC
    Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, GAC
    Special Price $124.99 Regular Price $134.99
    Add to Compare
  23. Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, KDF 55 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, KDF 55 / GAC
    Special Price $154.99 Regular Price $169.99
    Add to Compare
  24. Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, KDF 85 / GAC
    Big Big Whole House Filter Cartridges 4.5" x 20": (2) Sediment, Carbon Block, KDF 85 / GAC
    Special Price $156.99 Regular Price $169.99
    Add to Compare
  25. Big Blue Cartridge 4.5" x 20" Birm + KDF 85: Removes Iron/Manganese/Sulfur/Rotten Egg Smell
    Big Blue Cartridge 4.5" x 20" Birm + KDF 85: Removes Iron/Manganese/Sulfur/Rotten Egg Smell
    Special Price $89.99 Regular Price $99.99
    Add to Compare
  26. Big Blue Cartridge 4.5" x 20" | Cation Softening Resin 10% Cross Linked
    Big Blue Cartridge 4.5" x 20" | Cation Softening Resin 10% Cross Linked
    Special Price $66.99 Regular Price $77.99
    Add to Compare
  27. Big Blue Cartridge 4.5" x 20" | Granular Activated Coconut Shell Carbon (GAC)
    Big Blue Cartridge 4.5" x 20" | Granular Activated Coconut Shell Carbon (GAC)
    Special Price $43.99 Regular Price $51.99
    Add to Compare
  28. Big Blue Cartridge 4.5" x 20" | Mixed Bed DI Resin - for Spot Free Car Rinse
    Big Blue Cartridge 4.5" x 20" | Mixed Bed DI Resin - for Spot Free Car Rinse
    $89.99
    Add to Compare
  29. Big Blue Empty Refillable Cartridge 4.5" x 20" For 20" Housing
    Big Blue Empty Refillable Cartridge 4.5" x 20" For 20" Housing
    Special Price $26.99 Regular Price $29.99
    Add to Compare
  30. Big Blue Filter: Bone Char for Fluoride Removal Refillable Cartridge | 4.5"x20"
    Big Blue Filter: Bone Char for Fluoride Removal Refillable Cartridge | 4.5"x20"
    Special Price $107.99 Regular Price $119.99
    Add to Compare
  31. Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" | 10 Micron Nominal Filtration
    Big Blue Polyester Pleated Sediment Water Filter 4.5" x 20" | 10 Micron Nominal Filtration
    Special Price $32.99 Regular Price $39.99
    Add to Compare
  32. Big Blue Water Filter Cartridge: CARBON BLOCK 4.5" X 20"
    Big Blue Water Filter Cartridge: CARBON BLOCK 4.5" X 20"
    Special Price $37.99 Regular Price $44.99
    Add to Compare
  33. Big Blue Water Filters: Sediment + Carbon Block 4.5" x 20"
    Big Blue Water Filters: Sediment + Carbon Block 4.5" x 20"
    Special Price $56.99 Regular Price $64.99
    Add to Compare
  34. Big Blue Whole House Sediment Water Filter 4.5" x 20" | 5 Micron
    Big Blue Whole House Sediment Water Filter 4.5" x 20" | 5 Micron
    Special Price $23.99 Regular Price $32.99
    Add to Compare
  35. Granular Activated Coconut Shell Carbon Media (GAC) - 5 LBS | 12x40 Mesh
    Granular Activated Coconut Shell Carbon Media (GAC) - 5 LBS | 12x40 Mesh
    Special Price $28.99 Regular Price $32.99
    Add to Compare
  36. Hydro-Logic 22070 BigBOY - 4.5" x 20" Big Blue Refillable Water Filter Cartridge - Catalytic Coconut Shell Carbon + KDF 85: Removes Iron, Sulfur/Rotten Egg Smell
    Hydro-Logic 22070 BigBOY - 4.5" x 20" Big Blue Refillable Water Filter Cartridge - Catalytic Coconut Shell Carbon + KDF 85: Removes Iron, Sulfur/Rotten Egg Smell
    Special Price $94.99 Regular Price $104.99
    Add to Compare
  37. Hydro-Logic HLBBPSF 22010 Compatible Sediment Filter, 4.5-Inch x 20-Inch
    Hydro-Logic HLBBPSF 22010 Compatible Sediment Filter, 4.5-Inch x 20-Inch
    Special Price $54.99 Regular Price $62.99
    Add to Compare
  38. KDF 85 Filtration Media for Sulfur, Iron, Bacteria, Heavy Metals Removal - 2.5 Lb
    KDF 85 Filtration Media for Sulfur, Iron, Bacteria, Heavy Metals Removal - 2.5 Lb
    Special Price $49.99 Regular Price $54.99
    Add to Compare
  39. KDF 85 Filtration Media for Sulfur, Iron, Bacteria, Heavy Metals Removal - 5 Lb
    KDF 85 Filtration Media for Sulfur, Iron, Bacteria, Heavy Metals Removal - 5 Lb
    Special Price $99.99 Regular Price $109.99
    Add to Compare
  40. Lime/Scale Reducing Carbon Water Filter Cartridge for BIg Blue Systems 4.5 x 20"
    Lime/Scale Reducing Carbon Water Filter Cartridge for BIg Blue Systems 4.5 x 20"
    $124.99
    Add to Compare
  41. Single Housing Bracket for Whole House Big Blue 10-inch and 20-inch Filter Housings
    Single Housing Bracket for Whole House Big Blue 10-inch and 20-inch Filter Housings
    $13.99 As low as $7.49
    Add to Compare
  42. Standard Replacement Big Blue Filters/Cartridges for Whole House Water Filtration Systems - 4.5" x 20"
    Standard Replacement Big Blue Filters/Cartridges for Whole House Water Filtration Systems - 4.5" x 20"
    Special Price $99.99 Regular Price $109.99
    Add to Compare
  43. String Wound Poloypropylene Sediment Water Filter (4.5" x 20")
    String Wound Poloypropylene Sediment Water Filter (4.5" x 20")
    $25.00
    Out of stock
    Add to Compare
  44. Triple Canister Bracket for 3 Stage Big Blue Systems
    Triple Canister Bracket for 3 Stage Big Blue Systems
    Special Price $48.99 Regular Price $54.99
    Add to Compare
  45. Whole House Big Blue Replacement Water Filter: Strong Base Anion - Nitrate Reduction Cartridge (4.5" x 20")
    Whole House Big Blue Replacement Water Filter: Strong Base Anion - Nitrate Reduction Cartridge (4.5" x 20")
    Rating:
    100%
    1 Review
    Special Price $137.99 Regular Price $143.99
    Add to Compare
View as Grid List

45 Items

per page
Set Descending Direction
Compare Products
  1. Remove This Item
Compare
Clear All
You have no items to compare.
Additional Options
All Rights Reserved 2023 - 2024 Oceanic Water Systems