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

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  • Our products are price match guaranteed!
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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 473 total

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  • 3M Aqua-Pure AP101T Whole House Water Filter

    AP101T 3M Aqua-Pure Whole House Water Filtration System

    $103.99
    MSRP: $137.99
    Save 25%
  • 3M Aqua-Pure AP817-2 Whole House Water Filter Cartridge

    AP817-2 3M Aqua-Pure Whole House Filter Replacement Cartridge

    $85.99
    MSRP: $112.69
    Save 24%

    Out of stock

  • 3M Aqua-Pure AP903 Water Filter System

    AP903 3M Aqua-Pure Water Filtration System

    $239.99
    MSRP: $342.69
    Save 30%

    Out of stock

  • 3M Aqua-Pure AP910R Water Filter

    AP910R 3M Aqua-Pure Replacement Filter Cartridge

    $118.99
    MSRP: $128.79
    Save 8%

    Out of stock

  • EP25 3M Aqua-Pure Whole House Water Filter

    EP25 3M Aqua-Pure Whole House Water Filter Cartridge

    $91.99
    MSRP: $111.54
    Save 18%
  • CB6 OmniFilter Whole House Filter Replacement Cartridge
  • CQE-WH-01132 Crystal Quest 2.0 Whole House Nitrate Filter System

    CQE-WH-01132 Crystal Quest 2.0 Whole House Nitrate Filter System

    $1,659.99
    MSRP: $1,911.29
    Save 13%

    Out of stock

  • CFS01S Cuno Whole House Filter Housing

    CFS01S Cuno Whole House Water Filter Housing

    $132.05
    MSRP: $152.94
    Save 14%

    Out of stock

  • CFS02S Cuno Whole House Filter Housing

    CFS02S Cuno Whole House Water Filter Housing

    $184.49
    MSRP: $214.46
    Save 14%
  • CFS11S Cuno Whole House Filter Housing

    CFS11S Cuno Whole House Filter Housing

    $95.99
    MSRP: $101.19
    Save 5%
  • CFS22 Cuno Whole House Filter Housing

    CFS22 Cuno Whole House Filter Housing

    $128.99
    MSRP: $148.34
    Save 13%

    Out of stock

  • 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%

    Out of stock

  • HF65 Cuno Whole House Filter Replacement Cartridge

    HF65 Cuno Whole House Filter Replacement Cartridge

    $127.99
    MSRP: $148.80
    Save 14%

    Out of stock

  • HF65-S Cuno Whole House Filter Replacement Cartridge

    HF65-S Cuno Whole House Filter Replacement Cartridge

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

    HF95-S Cuno Whole House Water Filter Cartridge

    $195.99
    MSRP: $227.69
    Save 14%
  • P-124B Cuno Whole House Filter Replacement Cartridge

    P-124B Cuno Whole House Water Filter Cartridge

    $97.05
    MSRP: $128.79
    Save 25%
  • W9381105 Doulton Rio2000 Ceramic Multi-Candle Water Filter Cartridge
  • 4WH-QCTO-F01 Filtrete Replacement Filter Cartridge

    4WH-QCTO-F01 3M Filtrete Replacement Water Filter

    $96.99
    MSRP: $128.79
    Save 25%
  • 4WH-QCTO-S01 Filtrete Whole House Filter System

    4WH-QCTO-S01 3M Filtrete Whole House Water Filtration System

    $120.99
    MSRP: $174.79
    Save 31%
  • 4WH-QS-S01 Filtrete Whole House Filter System
  • 22006 Hydrologic BigBoy Replacement Carbon Filter - Green
  • 22070 Hydrologic BigBoy Replacement Carbon Filter

    22070 Hydrologic BigBoy Replacement Carbon Filter

    $88.99
    MSRP: $123.04
    Save 28%
  • ST-BC-4 Pentek Filter Housing - Stainless Steel

    ST-BC-4 Pentek Filter Housing - Stainless Steel

    $759.05
    MSRP: $1,009.11
    Save 25%
  • KDF55-20 Tier1 Replacement Filter Cartridge
  • SED-100DM Tier1 Metered Sediment Reduction Backwash Water Filter System
  • FPIR-BB-20 Watts Whole House Replacement Filter Cartridge
  • MATRIKX-1-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge
  • MATRIKX-Pb1-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge
  • OT32-S-05 OmniFilter Whole House Filter System

    OT32-S-05 OmniFilter Undersink Water Filtration System

    $112.99
    MSRP: $132.24
    Save 15%
  • 153098 Pentek Bag Filter Sump with 3/8-inch NPT Drain (bottom)
  • BBFS-22 Pentek Two Housing Filter System

    BBFS-22 Pentek Two Housing Filter System

    $175.09
    MSRP: $203.65
    Save 14%

    Out of stock

  • BBFS-222 Pentek Three Housing Filter System

    BBFS-222 Pentek Three Housing Filter System

    $224.99
    MSRP: $331.43
    Save 32%

    Out of stock

  • BIG-CLEAR-LX-10 Pentek Big Clear Whole House 10 inch Filter Housing
  • CBC20-BB Pentek Replacement Filter Cartridge
  • W20FFPH1CBPR Watts Flowmatic Big Clear Whole House Water Filter Housing
  • 3M Aqua-Pure AP510 Water Filter System
  • 3M Aqua-Pure AP802 Whole House Water Filter

    AP802 3M Aqua-Pure Whole House Water Filtration System

    $100.99
    MSRP: $118.44
    Save 15%

    Out of stock

  • 3M Aqua-Pure AP902 Whole House Water Filter

    AP902 3M Aqua-Pure Whole House Water Filtration System

    $204.99
    MSRP: $238.04
    Save 14%

    Out of stock

  • CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge
  • CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge
  • SST1HA 3M Aqua-Pure Water Filter System Housing
  • KDF85-10BB Tier1 Water Filter

    KDF85-10BB Tier1 Water Filter

    $81.99
    MSRP: $86.24
    Save 5%
  • KDF85-20 Tier1 Water Filter
  • F-20-2215 Aries Polypropylene Sediment Water Filter Replacement by Tier1
  • 3M Aqua-Pure AP102T Whole House Water Filter System

    AP102T 3M Aqua-Pure Whole House Filter System

    $139.99
    MSRP: $165.99
    Save 16%

    Out of stock

  • 3M Aqua-Pure AP904 Carbon Water Filter

    AP904 3M Aqua-Pure Carbon Water Filter

    $278.99
    MSRP: $330.00
    Save 15%

    Out of stock

  • 3M Aqua-Pure AP917HD-S Water Filter Cartridge

    AP917HD-S 3M Aqua-Pure Water Filter Cartridge

    $199.95
    MSRP: $217.99
    Save 8%

Items 1 to 48 of 473 total

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