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 114 total

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  • HALSEY-TAYLOR-55898C

    HALSEY-TAYLOR-55898C

    $91.69
    MSRP: $96.24
    Save 5%
  • HYDROLOGIC-22105

    HYDROLOGIC-22105

    $8.99
    MSRP: $12.06
    Save 25%
  • HYDROLOGIC-22110

    HYDROLOGIC-22110

    $18.99
  • K5520SS Omnipure Inline GAC Filter Cartridge

    K5520SS Omnipure Inline GAC Water Filter Cartridge

    $21.09
    MSRP: $33.99
    Save 38%
  • ARIES-AF-20-3690-BB

    ARIES-AF-20-3690-BB

    $126.05
    MSRP: $159.84
    Save 21%
  • C1-20 Pentek Comparable Whole House Carbon Water Filter by Tier1
  • RFC-BBS-D Culligan Comparable Whole 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%
  • EV977100 Everpure Chloramine Reduction Water Filter Replacement
  • AF-10-1053 Aries Specialty Cartridge Hydrogen Sulfide Removal
  • 22120 Hydrologic Stealth RO 100GPD Membrane

    22120 Hydrologic Stealth RO 100GPD Membrane

    $59.99
    MSRP: $64.99
    Save 8%
  • RFC-93 Pentek Radial Flow Carbon Water Filter Cartridge

    RFC-93 Pentek Radial Flow Carbon Water Filter Cartridge

    $23.99
    MSRP: $27.99
    Save 14%
  • C1-20 Pentek Comparable Whole House Water Filter by Tier1 (2-Pack)
  • C1-20 Pentek Comparable Whole House Water Filter by Tier1 (4-Pack)
  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter
  • RFC-BB Pentek Comparable Whole House Carbon Water Filter by Tier1
  • EV9635-01 Everpure Comparable Food Service Replacement Filter by Tier1
  • ELF-XL-1ML-P-KDF Omnipure Comparable Food Service Replacement Filter by Tier1
  • RFC-93 Whole House Filter Replacement Cartridge by Tier1
  • RWC-5 American Plumber Undersink Filter Replacement Cartridge
  • W5CIP478 American Plumber Undersink Compact Filter Replacement Cartridge (2-Pack)
  • WICA American Plumber Inline Filter with 1/4 inch Quick-Connect Fittings
  • AQUA-PURE-IL-IM-01

    AQUA-PURE-IL-IM-01

    $18.99
    MSRP: $24.14
    Save 21%
  • CULLIGAN-750R-D

    CULLIGAN-750R-D

    $18.49
  • CULLIGAN-IC-100-D

    CULLIGAN-IC-100-D

    $12.99
    MSRP: $16.78
    Save 23%
  • IC-750 Culligan Inline Filter
  • CULLIGAN-IC-EZ-1

    CULLIGAN-IC-EZ-1

    $20.99
    MSRP: $27.13
    Save 23%
  • CULLIGAN-RC-EZ-1

    CULLIGAN-RC-EZ-1

    $15.99
    MSRP: $17.93
    Save 11%
  • RV-EZ-1 Culligan Level 1 Easy-Change RV Inline Filter System
  • CULLIGAN-TS-500

    CULLIGAN-TS-500

    $30.89
  • CULLIGAN-US-EZ-1

    CULLIGAN-US-EZ-1

    $35.99
    MSRP: $45.76
    Save 21%
  • CUNO-CS-11

    CUNO-CS-11

    $61.29
  • CUNO-HF10-MS

    CUNO-HF10-MS

    $65.99
    MSRP: $68.30
    Save 3%
  • W9120145 Doulton Replacement Candle Set (6-Pack)

    W9120145 Doulton Replacement Candle Set (6-Pack)

    $106.00
    MSRP: $118.30
    Save 10%
  • W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9330962 Doulton Sterasyl Undersink Ceramic Candle Filter System
  • DOULTON-W9377010

    DOULTON-W9377010

  • ECOWATER-FXWF-1000

    ECOWATER-FXWF-1000

    $9.49
    MSRP: $12.64
    Save 25%
  • BH-2 Everpure Replacement Filter Cartridge

    BH-2 Everpure Replacement Filter Cartridge

    $59.99
    MSRP: $89.99
    Save 33%
  • EV9601-00 Everpure 4C Replacement Filter Cartridge
  • EV9611-00 Everpure 4H Replacement Filter Cartridge

    EV9611-00 Everpure 4H Replacement Filter Cartridge

    $50.69
    MSRP: $94.99
    Save 47%
  • EV9612-71 Everpure 4K Plus Replacement Filter Cartridge

    EV9612-71 Everpure 4K Plus Replacement Filter Cartridge

    $52.99
    MSRP: $59.79
    Save 11%

Items 1 to 48 of 114 total

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