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.

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Items 1 to 48 of 362 total

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  • EP15 3M Aqua-Pure Whole House Water Filter

    EP15 3M Aqua-Pure Whole House Water Filter Cartridge

    $69.99
    MSRP: $82.79
    Save 15%
  • EP25 3M Aqua-Pure Whole House Water Filter

    EP25 3M Aqua-Pure Whole House Water Filter Cartridge

    $91.99
    MSRP: $111.54
    Save 18%
  • CFS11S Cuno Whole House Filter Housing

    CFS11S Cuno Whole House Filter Housing

    $95.99
    MSRP: $101.19
    Save 5%
  • 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%
  • CFS8812X Cuno Whole House Filter Replacement Cartridge

    CFS8812X Cuno Whole House Filter Replacement Cartridge

    $66.05
    MSRP: $71.29
    Save 7%
  • CFS8812X-S Cuno Whole House Filter Replacement Cartridge

    CFS8812X-S Cuno Whole House Filter Replacement Cartridge

    $74.99
    MSRP: $77.04
    Save 3%
  • CFS9112 Cuno Whole House Filter Replacement Cartridge

    CFS9112 Cuno Whole House Filter Replacement Cartridge

    $62.99
    MSRP: $71.29
    Save 12%
  • CFS9720 Cuno Whole House Filter Replacement Cartridge
  • HF20 Cuno Whole House Filter Replacement Cartridge

    HF20 Cuno Whole House Filter Replacement Cartridge

    $64.99
    MSRP: $80.49
    Save 19%
  • HF20-MS Cuno Whole House Filter Replacement Cartridge

    HF20-MS Cuno Whole House Filter Replacement Cartridge

    $71.99
    MSRP: $73.36
    Save 2%
  • HF20-S Cuno Whole House Filter Replacement Cartridge

    HF20-S Cuno Whole House Filter Replacement Cartridge

    $68.99
    MSRP: $86.24
    Save 20%
  • HF25 Cuno Whole House Filter Replacement Cartridge
  • HF40-S Cuno Whole House Filter Replacement Cartridge

    HF40-S Cuno Whole House Filter Replacement Cartridge

    $105.99
    MSRP: $123.04
    Save 14%
  • HF60-S Cuno Whole House Filter Replacement Cartridge

    HF60-S Cuno Whole House Filter Replacement Cartridge

    $138.99
    MSRP: $160.99
    Save 14%
  • HF65 Cuno Whole House Filter Replacement Cartridge

    HF65 Cuno Whole House Filter Replacement Cartridge

    $127.99
    MSRP: $148.80
    Save 14%
  • HF65-S Cuno Whole House Filter Replacement Cartridge

    HF65-S Cuno Whole House Filter Replacement Cartridge

    $133.99
    MSRP: $155.81
    Save 14%
  • HF8-S Cuno Whole House Filter Replacement Cartridge
  • HF95-S Cuno Whole House Water Filter Cartridge

    HF95-S Cuno Whole House Water Filter Cartridge

    $195.99
    MSRP: $227.69
    Save 14%
  • W9122021 Doulton SuperCarb Replacement Ceramic Water Filter

    W9122021 Doulton SuperCarb Replacement Ceramic Water Filter

    $37.00
    MSRP: $54.26
    Save 32%
  • W9123019 Doulton UltraCarb SI Ceramic Filter Candle

    W9123019 Doulton UltraCarb SI Ceramic Filter Candle

    $41.00
    MSRP: $66.48
    Save 38%
  • W9223002 Doulton Replacement Ceramic Filter

    W9223002 Doulton Slimline Replacement Ceramic Filter

    $37.00
    MSRP: $60.87
    Save 39%
  • SDC-25-2020 Hydronix Whole House Replacement Sediment Filter Cartridge
  • SDC-45-1001 Hydronix Whole House Replacement Sediment Filter Cartridge
  • PX01-20 Purtrex Replacement Filter Cartridge

    PX01-20 Purtrex Replacement Water Filter Cartridge

    $7.99
    MSRP: $10.34
    Save 23%
  • PX20-20 Purtrex Replacement Filter Cartridge

    PX20-20 Purtrex Replacement Water Filter

    $10.99
    MSRP: $14.99
    Save 27%
  • PX75-20 Purtrex Replacement Filter Cartridge

    PX75-20 Purtrex Replacement Water Filter Cartridge

    $10.99
    MSRP: $14.99
    Save 27%
  • FPMB20-20 Watts Flo-Pro Whole House Replacement Filter Cartridge
  • GX01-20 Hytrex Replacement Filter Cartridge

    GX01-20 Hytrex Water Filter Cartridge

    $8.99
    MSRP: $12.64
    Save 29%
  • GX01-9-78 Hytrex Replacement Filter Cartridge

    GX01-9-78 Hytrex Replacement Water Filter Cartridge

    $5.49
    MSRP: $8.61
    Save 36%
  • GX03-20 Hytrex Replacement Filter Cartridge
  • GX05-20 Hytrex Replacement Filter Cartridge

    GX05-20 Hytrex Replacement Water Filter Cartridge

    $9.99
    MSRP: $11.49
    Save 13%
  • GX10-20 Hytrex Replacement Filter Cartridge

    GX10-20 Hytrex Water Filter Cartridge

    $7.99
    MSRP: $11.49
    Save 30%
  • GX10-9-78 Hytrex Replacement Filter Cartridge

    GX10-9-78 Hytrex Replacement Water Filter Cartridge

    $6.99
    MSRP: $8.61
    Save 19%
  • GX30-9-78 Hytrex Replacement Filter Cartridge

    GX30-9-78 Hytrex Water Filter Cartridge

    $5.99
    MSRP: $8.61
    Save 30%
  • GX50-20 Hytrex Replacement Filter Cartridge

    GX50-20 Hytrex Water Filter Cartridge

    $7.99
    MSRP: $11.49
    Save 30%
  • W9223022 Doulton Ultracarb Replacement Ceramic Filter

    W9223022 Doulton Ultracarb Replacement Ceramic Filter

    $62.00
    MSRP: $82.65
    Save 25%
  • W9223021 Doulton Ultracarb Ceramic Water Filter

    W9223021 Doulton Ultracarb Ceramic Water Filter

    $30.00
    MSRP: $70.14
    Save 57%
  • 158129 Pentek SlimLine Water Filter Housing (3/8 Inch)

    158129 Pentek SlimLine Water Filter Housing (3/8 Inch)

    $29.99
    MSRP: $36.79
    Save 18%
  • SPC-45-1010 Hydronix Pleated Sediment Water Filter

    SPC-45-1010 Hydronix Pleated Sediment Water Filter

    $16.99
    MSRP: $21.99
    Save 23%
  • SPC-45-1001 Hydronix Pleated Sediment Water Filter

    SPC-45-1001 Hydronix Pleated Sediment Water Filter

    $20.99
    MSRP: $27.99
    Save 25%
  • SDC-25-2001 Hydronix Sediment Water Filter Cartridge

    SDC-25-2001 Hydronix Sediment Water Filter Cartridge

    $6.99
    MSRP: $8.04
    Save 13%
  • 3M Aqua-Pure AP510 Water Filter System
  • 3M Aqua-Pure AP902 Whole House Water Filter

    AP902 3M Aqua-Pure Whole House Water Filtration System

    $204.99
    MSRP: $238.04
    Save 14%
  • FXB20RFL Filtrex Green Radial Flow Water Filter Cartridges
  • CB-25-2001 Hydronix Carbon Water Filter Replacement

    CB-25-2001 Hydronix Carbon Water Filter Replacement

    $28.99
    MSRP: $35.99
    Save 19%
  • CB-45-1001 Hydronix Replacement Whole House Filter Cartridge

Items 1 to 48 of 362 total

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