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 1 to 48 of 80 total

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  • W20CLA American Plumber Whole House Sediment Filter Cartridge (2-Pack)
  • W20CLHD American Plumber Whole House Heavy Duty Filter Cartridge
  • W20CLHD20 American Plumber Whole House 20-inch Heavy Duty Filter 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
  • 750R-D Culligan Level 1 Undersink RV and Marine Icemaker and Drinking Water Filter
  • S1A Culligan Level 2 Whole House Filter Replacement Cartridge (2-Pack)
  • GAC1SS OmniFilter Series C Undersink Filter Replacement Cartridge
  • 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    $7.99
    MSRP: $11.49
    Save 30%
  • HB-20-20W Harmsco Calypso Blue Replacement Filter Cartridge
  • 22010 Hydrologic BigBoy Replacement Sediment Filter

    22010 Hydrologic BigBoy Sediment Filter

    $44.99
    MSRP: $57.49
    Save 22%
  • SDC-25-1020 Hydronix Whole House Replacement Sediment Filter Cartridge
  • SDC-25-2020 Hydronix Whole House Replacement Sediment Filter Cartridge
  • GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    $13.89
    MSRP: $19.99
    Save 31%
  • GAC-5 Pentek Replacement Filter Cartridge
  • PS20-10C Pentek Whole House Replacement Sediment Filter Cartridge
  • QC10-GACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • S1-20BB Pentek Whole House Filter Replacement Cartridge

    S1-20BB Pentek Whole House Filter Replacement Cartridge

    $21.99
    MSRP: $25.34
    Save 13%
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99
    MSRP: $24.60
    Save 15%
  • PX20-20 Purtrex Replacement Filter Cartridge

    PX20-20 Purtrex Replacement Water Filter

    $4.99
    MSRP: $8.04
    Save 38%
  • PX20-9-78 Purtrex Replacement Filter Cartridge

    PX20-9-78 Purtrex Water Filter Cartridge

    $4.29
    MSRP: $9.99
    Save 57%
  • RS3-SS OmniFilter Whole House Filter Replacement Cartridge
  • FPMB-BB20-10 Watts Flo-Pro Whole House Replacement Filter Cartridge
  • FPMB20-20 Watts Flo-Pro Whole House Replacement Filter Cartridge
  • FPMB20-978 Watts Flo-Pro Replacement Filter Cartridge

    FPMB20-978 Watts Flo-Pro Replacement Water Filter

    $3.99
    MSRP: $5.16
    Save 23%
  • GX20-20 Hytrex Replacement Filter Cartridge

    GX20-20 Hytrex Water Filter Cartridge

    $7.99
    MSRP: $11.49
    Save 30%
  • GX20-9-78 Hytrex Replacement Filter Cartridge

    GX20-9-78 Hytrex Water Filter Cartridge

    $6.89
    MSRP: $8.61
    Save 20%
  • 800R OmniFilter Quick Change Replacement Filter Cartridge
  • PF-300S OmniFilter Water Pitcher Replacement Cartridge
  • PF-300T OmniFilter Water Pitcher Replacement Cartridge (3-Pack)
  • PF-500 OmniFilter 14-cup Water Pitcher

    PF-500 OmniFilter Water Filter Pitcher (14-Cup)

    $32.09
    MSRP: $49.99
    Save 36%
  • R800 OmniFilter Quick Change Inline Refrigerator Filter

    R800 OmniFilter Quick Change Inline Filter

    $28.99
    MSRP: $35.64
    Save 19%
  • RS3DS OmniFilter Whole House Replacement Filter Cartridge (2-Pack)
  • SFM2 OmniFilter Undersink Water Filter System

    USM2-S-S06 OmniFilter Undersink Water Filtration System

    $35.99
    MSRP: $48.29
    Save 25%
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $15.99
    MSRP: $21.99
    Save 27%
  • SPC-25-2020 Hydronix Pleated Sediment Water Filter

    SPC-25-2020 Hydronix Pleated Sediment Water Filter

    $10.99
    MSRP: $16.09
    Save 32%
  • FXB20RFL Filtrex Green Radial Flow Water Filter Cartridges
  • S1-BB Pentek Comparable Whole House Sediment Water Filter by Tier1
  • AP-GRMB-20PP-20UB Aquapure Comparable Sediment Water Filter by Tier 1
  • HB-20-20W Harmsco Comparable Whole House Sediment Water Filter by Tier1
  • OmniFilter RS12-SS6-05 Polypropylene Sediment Filter

    OmniFilter RS12-SS6-05 Polypropylene Sediment Filter

    $5.29
    MSRP: $11.99
    Save 56%
  • 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
  • AP-GRMB-20PP-20UB Whole House Water Filter Replacement Cartridge
  • AP-GRMB-20PP-10UB Whole House Water Filter Cartridge by 3M Aqua-Pure
  • WFDW120009W DuPont Universal Drinking Water Filter System

Items 1 to 48 of 80 total

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