Discount Water Filters and Air Filters at Discount Filter Store.com

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

Water Filtration Systems & 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.

Items 49 to 96 of 258 total

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  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge

    AP327 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $38.99
    MSRP: $50.99
    Save 24%
  • DW-200-R American Plumber Undersink Filter Replacement Cartridge
  • RWC-5 American Plumber Undersink Filter Replacement Cartridge
  • WCC American Plumber Undersink Filter Replacement Cartridge

    WCC American Plumber Undersink Filter Replacement Cartridge

    $19.99
    MSRP: $26.44
    Save 24%
  • WGC478 American Plumber Undersink Compact Filter Replacement Cartridge
  • WGCHD American Plumber Undersink Water Filter Replacement Cartridge
  • WICA American Plumber Inline Filter with 1/4 inch Quick-Connect Fittings
  • WICSA American Plumber Inline Filter with 1/4 inch Quick-Connect Fittings
  • WRC25HD American Plumber Whole House Heavy Duty Filter Cartridge
  • WRC25HD20 American Plumber Whole House 20-inch Heavy Duty Filter Cartridge
  • 3M Aqua-Pure AP117 Whole House Water Filter Cartridge

    3M Aqua-Pure AP117 Whole House Filter Replacement Cartridge

    $28.99
    MSRP: $54.13
    Save 46%
  • AP117RO 3M Aqua-Pure Reverse Osmosis Filter

    3M Aqua-Pure AP117RO Reverse Osmosis Filter

    $25.69
    MSRP: $38.99
    Save 34%
  • 3M Aqua-Pure AP200 Under Sink Water Filter

    AP200 3M Aqua-Pure Undersink Water Filtration System

    $87.05
    MSRP: $160.99
    Save 46%
  • 3M Aqua-Pure AP317 Water Filter Replacement Cartridge

    AP317 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $56.69
    MSRP: $78.99
    Save 28%
  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge

    AP517 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $71.69
    MSRP: $88.99
    Save 19%
  • 3M Aqua-Pure AP5527 Reverse Osmosis Filter
  • 3M Aqua-Pure AP717 Inline Water Filter

    AP717 3M Aqua-Pure Inline Filter System

    $25.99
    MSRP: $34.49
    Save 25%
  • 3M Aqua-Pure AP817 Whole House Water Filter Cartridge
  • 3M Aqua-Pure AP817-2 Whole House Water Filter Cartridge
  • 3M Aqua-Pure AP-C77 Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure AP-DW70 Undersink Filter Replacement Cartridge

    AP-DW70 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $47.99
    MSRP: $56.34
    Save 15%
  • 3M Aqua-Pure APS117 Whole House Water Filter Replacement Cartridge
  • 40624 Camco Evo Replacement Filter Cartridge

    40624 Camco Evo Replacement Water Filter Cartridge

    $18.99
    MSRP: $19.54
    Save 3%
  • 750R-D Culligan Level 1 Undersink RV and Marine Icemaker and Drinking Water Filter
  • D-20A Culligan Level 1 Undersink Water Filter Replacement Cartridge
  • D-250A Culligan Undersink Filter Replacement Cartridge Set

    D-250A Culligan Undersink Filter Replacement Cartridge Set

    $33.19
    MSRP: $46.99
    Save 29%
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • IC-100A Culligan Level 1 Disposable Inline Filter

    IC-100A Culligan Level 1 Disposable Inline Filter

    $12.99
    MSRP: $16.78
    Save 23%
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • PIT-1 Culligan Level 2 Water Pitcher

    PIT-1 Culligan Level 2 Water Pitcher

    $14.05
    MSRP: $25.99
    Save 46%
  • PR-1 Culligan Pitcher Replacement Cartridge

    PR-1 Culligan Water Filter Pitcher Replacement Cartridge

    $6.99
    MSRP: $12.52
    Save 44%
  • PR-1U Culligan Universal Water Pitcher Replacement Cartridge
  • PR-3 Culligan Water Pitcher Replacement Cartridge (3-Pack)

    PR-3 Culligan Water Pitcher Replacement Cartridge (3-Pack)

    $24.59
    MSRP: $33.99
    Save 28%
  • PR-3U Culligan Universal Water Pitcher Replacement Cartridge (3-Pack)
  • RFC-BBS-D Culligan Level 4 Whole House Filter Replacement Cartridge
  • RV-500A Culligan Level 1 Inline RV Pre-Tank Exterior Filter
  • RV-600A Culligan Level 1 Inline RV Pre-Tank Exterior Filter
  • RV-700 Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    RV-700 Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    $20.99
    MSRP: $35.64
    Save 41%
  • RV-800 Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    RV-800 Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    $28.89
    MSRP: $39.99
    Save 28%
  • US-600 Culligan Slim Undersink Filter System

    US-600 Culligan Slim Undersink Filter System

    $35.99
    MSRP: $41.39
    Save 13%
  • CFS117-S Cuno Whole House Filter Replacement Cartridge

    CFS117-S Cuno Whole House Filter Replacement Cartridge

    $32.05
    MSRP: $40.24
    Save 20%
  • CFS517 Cuno Whole House Filter Replacement Cartridge

    CFS517 Cuno Whole House Filter Replacement Cartridge

    $62.05
    MSRP: $87.39
    Save 29%
  • CFS8110 Cuno Whole House Filter Replacement Cartridge

    CFS8110 Cuno Whole House Filter Replacement Cartridge

    $56.99
    MSRP: $61.97
    Save 8%
  • CFS8112 Cuno Whole House Filter Replacement Cartridge

    CFS8112 Cuno Whole House Filter Replacement Cartridge

    $63.05
    MSRP: $69.56
    Save 9%
  • CFS8112-S Cuno Whole House Filter Replacement Cartridge

    CFS8112-S Cuno Whole House Filter Replacement Cartridge

    $70.99
    MSRP: $94.29
    Save 25%
  • CFS8720 Cuno Whole House Filter Replacement Cartridge

    CFS8720 Cuno Whole House Filter Replacement Cartridge

    $52.05
    MSRP: $61.97
    Save 16%
  • CFS8720-S Cuno Whole House Filter Replacement Cartridge

    CFS8720-S Cuno Whole House Filter Replacement Cartridge

    $58.05
    MSRP: $64.39
    Save 10%
  • CFS8812X Cuno Whole House Filter Replacement Cartridge

    CFS8812X Cuno Whole House Filter Replacement Cartridge

    $66.05
    MSRP: $71.29
    Save 7%

Items 49 to 96 of 258 total

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