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

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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 352 total

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  • AP117RO 3M Aqua-Pure Reverse Osmosis Filter
  • W9222909 Doulton Imperial SuperCarb OBE Ceramic Water Filter
  • 22105 Hydrologic SmallBoy Sediment Filter

    22105 Hydrologic SmallBoy Sediment Filter

    $8.99
    MSRP: $12.06
    Save 25%
  • 22110 Hydrologic SmallBoy Replacement Carbon Filter - Green
  • OMNIPURE-K5520SS

    OMNIPURE-K5520SS

    $21.09
    MSRP: $27.59
    Save 24%
  • PENTEK-CBC-10

    PENTEK-CBC-10

    $16.92
  • SPC-25-1030 Hydronix Pleated Sediment Water Filter

    SPC-25-1030 Hydronix Pleated Sediment Water Filter

    $9.99
    MSRP: $13.21
    Save 24%
  • CRYSTAL-QUEST-CQE-RC-04007

    CRYSTAL-QUEST-CQE-RC-04007

    $57.00
  • SWC-25-1020 Hydronix String Wound Sediment Water Filter

    SWC-25-1020 Hydronix String Wound Sediment Water Filter

    $6.99
    MSRP: $9.99
    Save 30%
  • TIER1-KDF85-10

    TIER1-KDF85-10

    $36.99
  • PENTEK-CFBC-10

    PENTEK-CFBC-10

    $13.99
  • 155014-43 Pentek Comparable Whole House Sediment Water Filter by Tier1
  • AP110 3M Aqua-Pure Comparable Whole House Sediment Water Filter by Tier1
  • TIER1-FX30-934-2PK

    TIER1-FX30-934-2PK

    $8.99
  • CW-F-D Culligan Comparable Whole House Water Filter 2-Pack by Tier1
  • TIER1-CW50-934

    TIER1-CW50-934

    $4.99
  • S1A-D Culligan Comparable Whole House Sediment Water Filter 2-Pack by Tier1
  • W20CLA American Plumber Comparable Whole House Water Filter by Tier1
  • RS1SS OmniFilter Comparable Whole House Water Filter by Tier1
  • FXWTC GE Comparable Whole House Water Filter 2-Pack by Tier1
  • PD-25-934 Pentek Comparable Whole House Water Filter by Tier1
  • RS2SS OmniFilter Comparable Whole House Water Filter by Tier1
  • WFPFC3002 DuPont Universal Whole House Pleated Poly Filter Cartridge (2-Pack)
  • HYDRONIX-HF2-10CLWH12

    HYDRONIX-HF2-10CLWH12

    $15.99
    MSRP: $22.99
    Save 30%
  • 22160 Triton Replacement Sediment Filter Cartridge by Hydrologic
  • AF-10-2010 Aries GAC/KDF Water Filter Cartridge

    AF-10-2010 Aries GAC/KDF Water Filter Cartridge

    $16.99
    MSRP: $22.99
    Save 26%
  • D-25 Culligan Under Sink Water Filter
  • AF-10-1053 Aries Specialty Cartridge Hydrogen Sulfide Removal
  • AF-10-2011 Aries Specialty Cartridge 10-inch x 2.5-inch 1 LBS KDF/GAC
  • OMNIFILTER-ROR2000-S-05

    OMNIFILTER-ROR2000-S-05

    $24.99
  • 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%
  • 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%
  • Aries AF-10-2115 KDF/Granular Activated Carbon

    Aries AF-10-2115 KDF/Granular Activated Carbon

    $39.99
    MSRP: $49.00
    Save 18%
  • SPC-25-1001 Hydronix Pleated Sediment Filter

    SPC-25-1001 Hydronix Pleated Sediment Water Filter

    $6.99 MSRP: $8.04
    Save 13%
  • Hydronix SPC-25-1005 Pleated Water Filter
  • SPC-25-1020 Hydronix Sediment Water Filter
  • Pentek CHLORPLUS-10 Whole House Water Filter Replacement Cartridge
  • Pentek CW-MF Whole House Water Filter Replacement Cartridge
  • Pentek ECP1-10 Replacement Water Filter Cartridge

    ECP1-10 Pentek Replacement Filter Cartridge

    $12.99 MSRP: $17.99
    Save 28%
  • Pentek EP-10 Replacement Water Filter Cartridge
  • EPM-10 Pentek Comparable Undersink Filter Replacement Cartridge by Tier1
  • EP-10 Pentek Comparable Carbon Block Water Filter by Tier1

    EP-10 Pentek Comparable Carbon Block Water Filter by Tier1

    $7.99 MSRP: $11.49
    Save 30%
  • P1 Pentek 10 x 2.5-inch Whole House Sediment Water Filter Replacement
  • P5 Pentek Comparable Whole House Replacement Sediment Filter Cartridge by Tier1
  • Pentek P1 Polyproplyene Water Filter (10 x 2 1/2)
  • Pentek S1 Pleated Whole House Sediment Filter
  • Pentek WS-10 Water Softening Water Filter

    Pentek WS-10 Water Softening Filter

    $19.99 MSRP: $24.83
    Save 19%

Items 1 to 48 of 352 total

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