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 105 total

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  • IHS22-D4 Trojan UV Disinfection System
  • HYDRONIX-HF2-10CLWH12

    HYDRONIX-HF2-10CLWH12

    $15.99
    MSRP: $22.99
    Save 30%
  • VH410M Viqua Home Plus UltraViolet Water Disinfection System

    VH410M Viqua Home Plus UltraViolet Water Disinfection System

    $839.00
    MSRP: $1,125.00
    Save 25%
  • VIQUA-E4
  • VIQUA-E4+
  • VIQUA-E4-V
  • PENTEK-150564

    PENTEK-150564

    $77.99
  • PENTEK-150072

    PENTEK-150072

    $27.99
    MSRP: $34.99
    Save 20%
  • 158098 Pentek Slim Line Water Filter Housing System

    158098 Pentek Slim Line Water Filter Housing System

    $15.99
    MSRP: $19.99
    Save 20%
  • PENTEK-158203

    PENTEK-158203

    $16.99
  • Hydronix HF45-10BLBK15 Filter Housing (Blue)

    Hydronix HF45-10BLBK15 Filter Housing (Blue)

    $59.99
    MSRP: $75.99
    Save 21%
  • HFPP-34-PR-20 Pentek Big Blue Whole House 20 inch Filter (6-Pack)
  • HFPP-1-PR20 Pentek Big Blue Whole House 20 inch Filter (6-Pack)
  • HF2-10BLBK12 Hydronix Whole House Filter Housing

    HF2-10BLBK12 Hydronix Whole House Filter Housing

    $16.99
    MSRP: $24.99
    Save 32%
  • HF2-10CLBK12 Hydronix Clear Whole House Filter Housing

    HF2-10CLBK12 Hydronix Clear Whole House Filter Housing

    $17.99
    MSRP: $25.99
    Save 31%
  • PL44-122NAC15 Pentek Bag Filter Housing - Carbon Steel
  • MPST-1 Pentek Multi-Purpose Cartridge and Bag Filter Housing - Stainless Steel
  • W385-PR American Plumber Undersink Compact Filter System

    W385-PR American Plumber Undersink Compact Filter System

    $19.99
    MSRP: $28.74
    Save 30%
  • AQUAPURE-AP431

    AQUAPURE-AP431

    $30.99
    MSRP: $33.25
    Save 7%
  • 3M Aqua-Pure AP717 Inline Water Filter

    AP717 3M Aqua-Pure Inline Filter System

    $31.99
    MSRP: $34.49
    Save 7%
  • 3M Aqua-Pure AP917R Water Filter Cartridge
  • W9320004 Doulton HIS Undersink Water Filtration System

    W9320004 Doulton HIS Undersink Water Filtration System

    $127.00
    MSRP: $235.99
    Save 46%
  • OMNIFILTER-OB5-S-05

    OMNIFILTER-OB5-S-05

    $29.99
  • PENTEK-HFPP-34-PR-20

    PENTEK-HFPP-34-PR-20

    $61.99
    MSRP: $67.38
    Save 8%
  • PENTEK-HFPP-PR10

    PENTEK-HFPP-PR10

    $33.99
    MSRP: $46.79
    Save 27%
  • PENTEK-HFPP-PR20

    PENTEK-HFPP-PR20

    $43.99
    MSRP: $66.23
    Save 34%
  • IC-101L Pentek Inline Filter
  • PENTEK-SLIM-PR10-JG38 Pentek Undersink Filter 10 inch Housing
  • PENTEK-ST-1

    PENTEK-ST-1

    $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-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%
  • 650683 Trojan UV Max UV Water Purification System
  • 650686 Trojan UV Max UV Water Purification System
  • 650690 Trojan UV Max UV Water Purification System
  • 650692 Trojan UV Max UV Water Purification System
  • 650695 Trojan UV Max UV Water Purification System
  • OMNIFILTER-BF7-S-05

    OMNIFILTER-BF7-S-05

    $69.99
    MSRP: $82.79
    Save 15%
  • OB1-S-05 OmniFilter Undersink Filter System
  • OMNIPURE-CL10PF5-B

    OMNIPURE-CL10PF5-B

    $14.29
  • OMNIPURE-CL10ROT33-B

    OMNIPURE-CL10ROT33-B

    $12.19
    MSRP: $13.79
    Save 12%
  • OMNIPURE-CL10ROT33-C

    OMNIPURE-CL10ROT33-C

    $9.99
    MSRP: $13.79
    Save 28%
  • OMNIPURE-CL10ROT40-B

    OMNIPURE-CL10ROT40-B

    $11.09
    MSRP: $13.79
    Save 20%
  • OMNIPURE-CL10ROT40-C

    OMNIPURE-CL10ROT40-C

    $8.99
    MSRP: $12.64
    Save 29%
  • OMNIPURE-CL6ROT33-B

    OMNIPURE-CL6ROT33-B

    $11.09
    MSRP: $11.49
    Save 3%
  • OMNIPURE-CL6ROT33-C

    OMNIPURE-CL6ROT33-C

    $8.89
    MSRP: $11.49
    Save 23%
  • PENTEK-158319

    PENTEK-158319

    $63.99

Items 1 to 48 of 105 total

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