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!

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  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
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  • You’re guaranteed to find expert help!

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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.

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Items 1 to 48 of 84 total

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  • AWP117 Viqua Carbon Block Filter for S2Q-DWS UV System

    AWP117 Viqua Carbon Block Filter for S2Q-DWS UV System

    $11.39
    MSRP: $16.99
    Save 33%
  • EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    $11.99
    MSRP: $20.99
    Save 43%
  • Culligan D30 Comparable Carbon Block Whole House Water Filter by Tier1
  • CBC-10 Pentek Comparable Replacement Filter Cartridge by Tier1
  • CBR2-10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1
  • Floplus 10 Pentek Comparable Carbon Block Whole House Water Filter by Tier1
  • D-30 Culligan Comparable Carbon Block Whole House Water Filter by Tier1
  • CBR2-10R Pentek Comparable Carbon Block Whole House Water Filter by Tier1
  • FXULC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1
  • CHLORPLUS-10 Pentek Comparable Whole House Water Filter by Tier1
  • D-40 Culligan Comparable Undersink Water Filter Replacement Cartridge by Tier1
  • CB1-SS6-S06 OmniFilter Comparable Undersink Water Filter Cartridge by Tier1
  • RFC-20 Pentek Comparable Whole House Filter Replacement Cartridge by Tier1
  • CB-25-2010 Hydronix Comparable Replacement Filter Cartridge by Tier1
  • CB3-SS6-06 OmniFilter Comparable Undersink Filter Replacement Cartridge by Tier1
  • FXUTC GE SmartWater Comparable Undersink Filter Replacement Cartridge by Tier1
  • EP10-10 Tier1 Carbon Block Water Filter
  • EP5-10 Tier1 Carbon Block Water Filter
  • D-15 Culligan Whole Comparable House Carbon Water Filter by Tier1
  • HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    $13.99
    MSRP: $19.99
    Save 30%
  • Pentek 255579-43 Inline Sediment Water Filter Replacement

    Pentek 255579-43 Inline Sediment Water Filter Replacement

    $14.29
    MSRP: $21.99
    Save 35%
  • Tier1 Culligan Compatible PRE-RO Carbon Block Reverse Osmosis
  • WFDWC20001 DuPont Universal Drinking Water Carbon Block Cartridge
  • WFPFC8002 DuPont Universal Whole House Carbon Wrap Two-Phase Cartridge (2-pack)
  • HDG-CB-AC10 Hydronix Comparable PRE-RO Carbon Block Reverse Osmosis Filter by Tier1
  • CB1-10 Pentek Carbon Block Water Filter Replacement

    CB1-10 Pentek Carbon Block Water Filter Replacement

    $15.39
    MSRP: $23.99
    Save 36%
  • WHKF-DB1 Whirlpool Comparable Under Sink Water Filter by Tier1
  • MAXETW-975 Watts Comparable C-MAX Replacement Water Filter Cartridge by Tier1
  • CBC-10 Pentek Replacement Water Filter
  • EPM-20 Pentek Whole House Water Filter

    Pentek EPM-20 Whole House Water Filter Replacement Cartridge

    $16.99 MSRP: $19.34
    Save 12%
  • EP5-20 Tier1 Carbon Block Water Filter

    EP5-20 Tier1 Carbon Block Water Filter

    $16.99 MSRP: $20.69
    Save 18%
  • WFHDC3001 DuPont Universal Heavy Duty Pleated Poly Whole House Cartridge
  • Pentek EP-10 Replacement Water Filter Cartridge
  • EPM-BB Pentek Comparable Carbon Whole House Water Filter

    EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    $17.99 MSRP: $30.99
    Save 42%
  • EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    $17.99 MSRP: $30.99
    Save 42%
  • 22110 Hydrologic SmallBoy Replacement Carbon Filter - Green
  • Nubo 57-3038 Ocean Blue Neoprene Bottle Cover

    Nubo 57-3038 Ocean Blue Neoprene Bottle Cover

    $17.99
    MSRP: $20.34
    Save 12%
  • CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    $10.29
    MSRP: $15.99
    Save 36%
  • 67001 Aquamira Water Bottle Replacement Filter Cartridge
  • 67005 Aquamira Frontier Emergency Water Filter System

    67005 Aquamira Frontier Emergency Water Filter System

    $11.99
    MSRP: $13.74
    Save 13%
  • 67011 / CR-100 Aquamira Water Bottle Replacement Filter Capsule - front

    67011 / CR-100 Aquamira Filtered Water Bottle Capsule

    $12.95
    MSRP: $17.19
    Save 25%
  • 67108 Aquamira Frontier Sport Water Bottle Replacement Filter Cartridge (Military) - front
  • SCL10-B Omnipure Scale Inline Filter

    SCL10-B Omnipure Scale Inline Filter

    $12.99
    MSRP: $17.24
    Save 25%
  • CEP-10E Pentek Replacement Filter Cartridge
  • E5320 Omnipure Replacement Filter Cartridge

    E5320 Omnipure Replacement Filter Cartridge

    $13.69
    MSRP: $21.99
    Save 38%
  • FM-25R Culligan Replacement Faucet Filter

    FM-25R Culligan Replacement Faucet Filter

    $13.89
    MSRP: $21.99
    Save 37%
  • 67003 Aquamira Frontier Sport Water Bottle Replacement Filter Cartridge - front

    67003 Aquamira Frontier Sport Water Bottle Filter

    $13.99
    MSRP: $17.19
    Save 19%
  • Pentek CFB-PB10 Lead & Cyst Carbon Filter

    Pentek CFB-PB10 Lead & Cyst Carbon Filter

    $13.99
    MSRP: $17.12
    Save 18%

Items 1 to 48 of 84 total

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