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 118 total

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  • TFM-24 Desal Reverse Osmosis Membrane

    TFM-24 Desal Reverse Osmosis Membrane

    $24.99
    MSRP: $47.14
    Save 47%
  • 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    $7.99
    MSRP: $11.49
    Save 30%
  • CFBC-20 Pentek Replacement Filter Cartridge

    CFBC-20 Pentek Replacement Water Filter Cartridge

    $23.49
    MSRP: $29.31
    Save 20%
  • KO25G2S Pentek Polypropylene Bag Filter

    KO25G2S Pentek Polypropylene Bag Filters

    $6.05
    MSRP: $9.42
    Save 36%
  • KO25HE2 Pentek Polypropylene High Efficiency Bag Filter

    KO25HE2 Pentek Polypropylene High Efficiency Bag Filter

    $16.99
    MSRP: $19.34
    Save 12%
  • KO50G2S Pentek Polypropylene Bag Filter

    KO50G2S Pentek Polypropylene Bag Filter

    $6.19
    MSRP: $9.42
    Save 34%
  • KO50G4S Pentek Polypropylene Filter Bag

    KO50G4S Pentek Polypropylene Filter Bag

    $5.09
    MSRP: $9.99
    Save 49%
  • KO5G3S Pentek Polypropylene Bag Filter

    KO5G3S Pentek Polypropylene Filter Bags

    $4.99
    MSRP: $7.00
    Save 29%
  • OAC-20BB Pentek Oil Reduction Filter

    OAC-20BB Pentek Oil Reduction Water Filter

    $73.99
    MSRP: $85.20
    Save 13%
  • P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    $33.99
    MSRP: $44.99
    Save 24%
  • P-250A Pentek Undersink Filter Set
  • PCC218 Pentek Replacement Filter Cartridge

    PCC218 Pentek Replacement Filter Cartridge

    $23.99
    MSRP: $26.44
    Save 9%
  • PD-1-20 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-1-40 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-1-934 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-25-30 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-5-30 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-5-30 Pentek Whole House Sediment Filter Cartridge

    $15.99
    MSRP: $16.55
    Save 3%
  • PD-5-40 Pentek Whole House Replacement Sediment Filter Cartridge

    PD-5-40 Pentek Whole House Sediment Filter Cartridge

    $18.99
    MSRP: $24.34
    Save 22%
  • PD-50-20 Pentek Whole House Replacement Sediment Filter Cartridge
  • PS1-10C Pentek Whole House Replacement Sediment Filter Cartridge
  • PS20-10C Pentek Whole House Replacement Sediment Filter Cartridge
  • ROM-230TN Pentek Reverse Osmosis Membrane

    ROM-230TN Pentek Reverse Osmosis Membrane

    $80.39
    MSRP: $118.99
    Save 32%
  • ROM-26T Pentek Reverse Osmosis Membrane

    ROM-26T Pentek Reverse Osmosis Membrane

    $73.99
    MSRP: $84.05
    Save 12%
  • ST-1 Pentek Filter Housing - Stainless Steel

    ST-1 Pentek Filter Housing - Stainless Steel

    $167.99
    MSRP: $191.81
    Save 12%
  • ST-2 Pentek Filter Housing - Stainless Steel

    ST-2 Pentek Filter Housing - Stainless Steel

    $239.89
    MSRP: $368.99
    Save 35%
  • ST-3 Pentek Filter Housing - Stainless Steel

    ST-3 Pentek Filter Housing - Stainless Steel

    $283.99
    MSRP: $345.79
    Save 18%
  • ST-BC-4 Pentek Filter Housing - Stainless Steel

    ST-BC-4 Pentek Filter Housing - Stainless Steel

    $759.05
    MSRP: $1,009.11
    Save 25%
  • ST-BC-8 Pentek Filter Housing - Stainless Steel
  • TS-101L Pentek Lime/Scale Inline Filter

    TS-101L Pentek Lime/Scale Inline Filter

    $13.19
    MSRP: $20.99
    Save 37%
  • WP-5 Pentek Replacement Filter Cartridge

    WP-5 Pentek Replacement Filter Cartridge

    $6.99
    MSRP: $8.84
    Save 21%
  • WP-5BB97P Pentek Replacement Filter Cartridge
  • WP1BB97P Pentek Replacement Filter Cartridge
  • WP5BB20P Pentek Replacement Filter Cartridge

    WP5BB20P Pentek Replacement Filter Cartridge

    $34.99
    MSRP: $42.54
    Save 18%
  • WPX100BB20P Pentek Replacement Filter Cartridge
  • WPX100BB97P Pentek Replacement Filter Cartridge

    WPX100BB97P Pentek Replacement Filter Cartridge

    $18.99
    MSRP: $24.14
    Save 21%
  • WPX50BB97P Pentek Replacement Filter Cartridge

    WPX50BB97P Pentek Replacement Filter Cartridge

    $19.99
    MSRP: $24.14
    Save 17%
  • WS-20 Pentek Water Softening Filter

    WS-20 Pentek Water Softening Filter

    $26.99
    MSRP: $35.64
    Save 24%
  • FU-WDF-103-B Tier1 Long-Reach Black Faucet FCT-LR-B - Black
  • FU-WDF-103-W Tier1 Long-Reach Faucet - White
  • LF-BLR Tier1 Long-Reach Faucet - Chrome

    LF-BLR Tier1 Long-Reach Faucet - Chrome

    $17.99
    MSRP: $26.32
    Save 32%
  • LF-BLR-BN Tier1 Long-Reach Faucet - Brushed Nickel

    LF-BLR-BN Tier1 Long-Reach Faucet - Brushed Nickel

    $29.99
    MSRP: $36.79
    Save 18%
  • LF-BLRAG Tier1 Long-Reach Air-Gap Faucet - Chrome

    LF-BLRAG Tier1 Long-Reach Air-Gap Faucet - Chrome

    $18.99
    MSRP: $34.72
    Save 45%
  • LF-BLRAG-BN Tier1 Low Lead Air Gap Faucet - Brushed Nickel

    LF-BLRAG-BN Tier1 Low Lead Air Gap Faucet - Brushed Nickel

    $32.99
    MSRP: $42.84
    Save 23%
  • LF-EC25-BN Tier1 Contemporary Ceramic Faucet - Brushed Nickel
  • LF-EC25-CP Tier1 Contemporary Ceramic Faucet - Chrome

    LF-EC25-CP Tier1 Contemporary Ceramic Faucet - Chrome

    $30.99
    MSRP: $51.74
    Save 40%
  • LF-EC25-SN Tier1 Contemporary Ceramic Faucet - Satin Nickel
  • LF-EC32-CP Tier1 Classic Ceramic Faucet - Chrome
  • 144839 Pentek Touch Flo Air Gap Drinking Water Faucet - Chrome

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