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20 x 4.5 Inch Big Blue Water Filters

Used in Whole House Systems, Commercial Filter Systems, and many other Water Filter Systems
101 Results
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  • Pentek OAC-20BB Oil Reduction Filter

    Pentek OAC-20BB Oil Reduction Filter

    (Retail Price: $112.79 ) $93.99
  • Pentek PCC-106 Phosphate Crystal Water Filter Insert

    Pentek PCC-106 Phosphate Crystal Water Filter Insert

    (Retail Price: $27.99 ) $20.59
  • Pentek CRFC-20BB Chloramine Reduction Water Filter

    Pentek CRFC-20BB Chloramine Reduction Water Filter

    (Retail Price: $151.99 ) $135.99
  • Crystal Quest 4-5/8 in x 20 in, 5-Micron Carbon Block Filter Cartridge

    Crystal Quest 4-5/8 in x 20 in, 5-Micron Carbon Block Filter Cartridge

    (Retail Price: $51.59 ) $48.99
  • Tier1 4.5-Inch OD X 20-Inch L White Empty Filter Cartridges

    Tier1 4.5-Inch OD X 20-Inch L White Empty Filter Cartridges

    (Retail Price: $23.99 ) $19.99
  • Crystal Quest 4-5/8 in x 20 in Multi Stage PLUS Filter Cartridge

    Crystal Quest 4-5/8 in x 20 in Multi Stage PLUS Filter Cartridge

    (Retail Price: $235.99 ) $235.00
  • Crystal Quest 4-5/8 in x 20 in Multi Stage ULTRA Filter Cartridge

    Crystal Quest 4-5/8 in x 20 in Multi Stage ULTRA Filter Cartridge

    (Retail Price: $378.00 ) $315.00
  • Crystal Quest 4-5/8 in x 20 in Multi Stage ULTIMATE Filter Cartridge

    Crystal Quest 4-5/8 in x 20 in Multi Stage ULTIMATE Filter Cartridge

    (Retail Price: $474.00 ) $395.00
  • C2-02 Whole House Carbon Filter by Viqua

    C2-02 Whole House Carbon Filter by Viqua

    (Retail Price: $89.00 ) $49.99
  • Tier1 20 inch x 4.5 inch Pleated Sediment Water Filter (1 Micron)

    Tier1 20 inch x 4.5 inch Pleated Sediment Water Filter (1 Micron)

    (Retail Price: $38.99 ) $25.99
  • SPC-45-2020 Hydronix Comparable Pleated Sediment Water Filter by Tier1

    Tier1 20 inch x 4.5 inch Pleated Sediment Water Filter (20 Micron)

    (Retail Price: $32.99 ) $19.99
  • Tier1 20 inch x 4.5 inch String-Wound Sediment Water Filter (1 Micron)

    Tier1 20 inch x 4.5 inch String-Wound Sediment Water Filter (1 Micron)

    (Retail Price: $35.99 ) $23.99
  • Tier1 20 inch x 4.5 inch String-Wound Sediment Water Filter (5 Micron)

    Tier1 20 inch x 4.5 inch String-Wound Sediment Water Filter (5 Micron)

    (Retail Price: $40.99 ) $27.99
  • Tier1 20 inch x 4.5 inch Comparable String Wound Sediment Water Filter (20 micron)

    Tier1 20 inch x 4.5 inch Comparable String Wound Sediment Water Filter (20 micron)

    (Retail Price: $38.99 ) $25.99
  • Tier1 20 inch x 4.5 inch Comparable String Wound Sediment Water Filter (30 Micron)

    Tier1 20 inch x 4.5 inch Comparable String Wound Sediment Water Filter (30 Micron)

    (Retail Price: $34.99 ) $22.99
  • Pentek ECP1-20BB Comparable Pleated Sediment Water Filter by Tier1

    Pentek ECP1-20BB Comparable Pleated Sediment Water Filter by Tier1 (20-inch x 4-1/2-inch)

    (Retail Price: $33.99 ) $22.99
  • Tier1 Pentek ECP50-20BB Comparable Pleated Sediment Water Filter

    Tier1 Pentek ECP50-20BB Comparable Pleated Sediment Water Filter

    (Retail Price: $31.99 ) $20.99
  • CMB-520-HF Whole House Sediment Filter by Viqua

    CMB-520-HF Whole House Sediment Filter by Viqua

    (Retail Price: $39.00 ) $27.99
  • Harmsco WB-HB-20-20W Pleated Commercial Water Filter Cartridge

    Harmsco WB-HB-20-20W Pleated Commercial Water Filter Cartridge

    (Retail Price: $37.99 ) $29.99
  • Harmsco WB-HB-20-50W Pleated Commercial Water Filter Cartridge

    Harmsco WB-HB-20-50W Pleated Commercial Water Filter Cartridge

    (Retail Price: $39.99 ) $31.79
  • Tier1 20 inch x 4.5 inch Pleated Sediment Water Filter (20 Micron) (6 Pack)

    Tier1 20 inch x 4.5 inch Pleated Sediment Water Filter (20 Micron) (6 Pack)

    $107.99

  • EP-20BB 155583-43 Pentek Carbon Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1

    Tier1 Pentek EP-20BB 155583-43 Carbon Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant

    $50.99

  • R30-20BB 155430-43 Pentek Pleated Polyester Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1 (20 inches x 4-1/2 inches, 30 Micron)

    Tier1 Pentek R30-20BB Comparable 155430-43 Pleated Polyester Filter Cartridge Replacement Kit with O-ring and Lubricant (20 inches x 4-1/2 inches, 30 Micron)

    $24.99

  • DGD-5005-20 155358 Pentek Spun Polypropylene Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1

    Tier1 Pentek DGD-5005-20 Comparable 155358 Spun Polypropylene Filter Cartridge Replacement Kit with O-ring and Lubricant

    $26.99

  • Tier1 Iron and Manganese Reducing Replacement Water Filter

    Tier1 Iron and Manganese Reducing Replacement Water Filter

    (Retail Price: $63.69 ) $48.99
  • Tier1 Iron and Lead Reducing Replacement Water Filter

    Tier1 Iron and Lead Reducing Replacement Water Filter

    (Retail Price: $84.49 ) $64.99
  • Pentek RFC-20BB Radial Flow Water Filters (20-inch x 4.5-inch) (Main Image)

    Pentek RFC-20BB Radial Flow Water Filters (20-inch x 4.5-inch)

    (Retail Price: $82.91 ) $66.99
  • 20 X 4.5 Carbon Block Replacement Filter by Tier1 (5 micron)

    20 X 4.5 Carbon Block Replacement Filter by Tier1 (5 micron)

    (Retail Price: $69.77 ) $33.99
  • 20 X 4.5 Spun Wound Polypropylene Replacement Filter by Tier1 (5 micron)

    20 X 4.5 Spun Wound Polypropylene Replacement Filter by Tier1 (5 micron)

    (Retail Price: $25.76 ) $17.99
  • 20 X 4.5 Spun Wound Polypropylene Replacement Filter by Tier1 (1 micron)

    20 X 4.5 Spun Wound Polypropylene Replacement Filter by Tier1 (1 micron)

    (Retail Price: $24.99 ) $18.99
  • 20 X 4.5 Radial Flow Granular Activated Carbon Replacement Filter (25 micron)

    Tier1 RFC-20BB 20 X 4.5 Radial Flow Granular Activated Carbon Replacement Filter (25 micron)

    (Retail Price: $57.99 ) $34.99
  • 20 X 4.5 Carbon Block Replacement Filter by Tier1 (10 micron)

    20 X 4.5 Carbon Block Replacement Filter by Tier1 (10 micron)

    (Retail Price: $48.99 ) $39.99
  • 20 X 4.5 Pleated Cellulose Replacement Filter by Tier1 (20 micron)

    20 X 4.5 Pleated Cellulose Replacement Filter by Tier1 (20 micron)

    (Retail Price: $26.99 ) $16.99
  • Tier1 20 inch x 4.5 inch Whole House Sediment Water Filter (5 Micron)

    Tier1 20 inch x 4.5 inch Whole House Sediment Water Filter (5 Micron)

    (Retail Price: $29.99 ) $20.99
  • 20 X 4.5 Pleated Polyester Replacement Filter by Tier1 (30 micron)

    20 X 4.5 Pleated Polyester Replacement Filter by Tier1 (30 micron)

    (Retail Price: $25.99 ) $18.99
  • 20 X 4.5 Granular Activated Carbon Replacement Filter by Tier1 (20 micron)

    20 X 4.5 Granular Activated Carbon Replacement Filter by Tier1 (20 micron)

    (Retail Price: $46.79 ) $40.99
  • Pentek S120-BB Sediment Water Filters (20-inch x 4.5-inch)

    Pentek S120-BB Sediment Water Filters (20-inch x 4.5-inch)

    (Retail Price: $25.34 ) $24.99
  • Pentek BBF1-20MB Mixed Bed Deionization Water Filter (20-inch x 4.5-inch)

    Pentek BBF1-20MB Mixed Bed Deionization Water Filter (20-inch x 4.5-inch)

    (Retail Price: $144.23 ) $115.99
  • American Plumber W20CLHD20 Pleated Cellulose Water Filters

    American Plumber W20CLHD20 Pleated Cellulose Water Filters

    (Retail Price: $35.99 ) $28.99
  • American Plumber WRC25HD20 Carbon Water Filters

    American Plumber WRC25HD20 Carbon Water Filters

    (Retail Price: $78.19 ) $69.99
  • 3M Aqua-Pure AP810-2 Whole House Water Filter

    3M Aqua-Pure AP810-2 Whole House Filter

    (Retail Price: $84.20 ) $52.99
  • 3M CUNO Aqua-Pure AP811-2 Whole House Filter

    3M Aqua-Pure AP811-2 Whole House Filter

    (Retail Price: $79.99 ) $58.99
  • 3M Aqua-Pure AP817-2 Whole House Water Filter

    3M Aqua-Pure AP817-2 Whole House Water Filter

    (Retail Price: $127.73 ) $85.99
  • Harmsco HB-20-1W CALYPSO BLUE 20-inch x 4.5-inch, 1 Micron

    Harmsco HB-20-1W CALYPSO BLUE 20-inch x 4.5-inch, 1 Micron

    (Retail Price: $59.99 ) $35.99
  • Harmsco HB-20-20W CALYPSO BLUE 20-inch x 4.5-inch, 20 Micron

    Harmsco HB-20-20W CALYPSO BLUE 20-inch x 4.5-inch, 20 Micron

    (Retail Price: $40.19 ) $38.99
  • Harmsco HB-20-50W Calypso Blue Water Filter

    Harmsco HB-20-50W Calypso Blue Water Filter

    (Retail Price: $49.99 ) $39.99
  • Harmsco HB-20-5W CALYPSO BLUE 20-inch x 4.5-inch, 5 Micron

    Harmsco HB-20-5W CALYPSO BLUE 20-inch x 4.5-inch, 5 Micron

    (Retail Price: $47.99 ) $31.99
  • Hydrologic 22006 BigBoy Replacement Carbon Filter - Green

    Hydrologic 22006 BigBoy Replacement Carbon Filter - Green

    (Retail Price: $88.79 ) $78.99
101 Results
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