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 73 total

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  • AMERICAN-PLUMBER-DW-200-R

    AMERICAN-PLUMBER-DW-200-R

    $18.99
    MSRP: $21.15
    Save 10%
  • RWC-5 American Plumber Undersink Filter Replacement Cartridge
  • AQUAPURE-AP200

    AQUAPURE-AP200

    $87.05
    MSRP: $135.69
    Save 36%
  • AQUAPURE-AP217

    AQUAPURE-AP217

    $36.99
  • AQUAPURE-AP517

    AQUAPURE-AP517

    $66.99
    MSRP: $70.14
    Save 4%
  • AQUAPURE-C-CS-FF

    AQUAPURE-C-CS-FF

    $43.99
    MSRP: $48.06
    Save 8%
  • CULLIGAN-ISH-100

    CULLIGAN-ISH-100

    $24.99
  • CULLIGAN-ISH-200

    CULLIGAN-ISH-200

    $30.99
    MSRP: $32.19
    Save 4%
  • CULLIGAN-RDSH-C115

    CULLIGAN-RDSH-C115

    $38.99
    MSRP: $48.98
    Save 20%
  • CULLIGAN-RFC-BBS-D

    CULLIGAN-RFC-BBS-D

    $29.99
    MSRP: $34.60
    Save 13%
  • CULLIGAN-RWC-5

    CULLIGAN-RWC-5

    $12.99
    MSRP: $17.24
    Save 25%
  • CFS117-S Cuno Whole House Filter Replacement Cartridge

    CFS117-S Cuno Whole House Filter Replacement Cartridge

    $32.05
    MSRP: $40.24
    Save 20%
  • HF40-S Cuno Whole House Filter Replacement Cartridge

    HF40-S Cuno Whole House Filter Replacement Cartridge

    $105.99
    MSRP: $123.04
    Save 14%
  • HF45-S Cuno Whole House Filter Replacement Cartridge

    HF45-S Cuno Whole House Filter Replacement Cartridge

    $103.99
    MSRP: $120.39
    Save 14%
  • TW30-1812-100 Filmtec Reverse Osmosis Membrane

    TW30-1812-100 Filmtec Reverse Osmosis Membrane (100GPD)

    $39.99
    MSRP: $48.29
    Save 17%
  • TW30-1812-24 Filmtec Reverse Osmosis Membrane

    TW30-1812-24 Filmtec Reverse Osmosis Membrane

    $23.99
    MSRP: $40.24
    Save 40%
  • TW30-1812-36 Filmtec Reverse Osmosis Membrane

    TW30-1812-36 Filmtec Reverse Osmosis Membrane

    $41.99
    MSRP: $48.29
    Save 13%
  • TW30-1812-50 Filmtec Reverse Osmosis Membrane

    TW30-1812-50 Filmtec Reverse Osmosis Membrane (50 GPD)

    $25.99
    MSRP: $51.74
    Save 50%
  • TW30-1812-75 Filmtec Reverse Osmosis Membrane
  • 3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    $21.99
    MSRP: $23.99
    Save 8%
  • 3US-AS01 Filtrete Undersink Filter System

    3US-AS01 Filtrete Undersink Filter System

    $41.99
    MSRP: $50.59
    Save 17%
  • 3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    $35.99
    MSRP: $37.99
    Save 5%
  • GXULQ

    GXULQ

    $55.99
    MSRP: $70.14
    Save 20%
  • GXULQR

    GXULQR

    $41.99
    MSRP: $43.69
    Save 4%
  • MANITOWOC-K00174

    MANITOWOC-K00174

  • CFBC-20 Pentek Replacement Filter Cartridge

    CFBC-20 Pentek Replacement Water Filter Cartridge

    $23.49
    MSRP: $29.31
    Save 20%
  • FLOPLUS-10BB Pentek Replacement Filter Cartridge

    FLOPLUS-10BB Pentek Replacement Filter Cartridge

    $44.99
    MSRP: $48.52
    Save 7%
  • FLOPLUS-20 Pentek Replacement Filter Cartridge

    FLOPLUS-20 Pentek Replacement Filter Cartridge

    $28.99
    MSRP: $31.84
    Save 9%
  • GAC-20 Pentek Replacement Filter Cartridge

    GAC-20 Pentek Replacement Filter Cartridge

    $17.99
    MSRP: $23.56
    Save 24%
  • GAC-BB Pentek Replacement Filter Cartridge

    GAC-BB Pentek Replacement Filter Cartridge

    $25.99
    MSRP: $30.51
    Save 15%
  • P5-478 Pentek Undersink Filter Replacement Cartridge

    P5-478 Pentek Undersink Filter Replacement Cartridge

    $6.99
    MSRP: $8.15
    Save 14%
  • PD-1-934 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-5-934 Pentek Undersink Filter Replacement Cartridge

    PD-5-934 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $12.34
    Save 19%
  • PD-50-934 Pentek Whole House Filter Replacement Cartridge
  • RFC-BB Pentek Whole House Filter Replacement Cartridge - 1
  • UV-110-1 Pentek UV System
  • WS-20BB Pentek Whole House Filter Replacement Cartridge

    WS-20BB Pentek Whole House Filter Replacement Cartridge

    $45.99
    MSRP: $52.08
    Save 12%
  • RAINSHOWR-GK-1

    RAINSHOWR-GK-1

    $57.05
    MSRP: $70.14
    Save 19%
  • TFM-50-A Tier1 Reverse Osmosis Membrane

    TFM-50-A Tier1 Reverse Osmosis Membrane

    $45.99
    MSRP: $55.19
    Save 17%
  • MAXPB-975 Watts C-MAX Replacement Filter Cartridge

    MAXPB-975 Watts C-MAX Water Filter Cartridge

    $17.99
    MSRP: $20.69
    Save 13%
  • MAXVOC-975 Watts C-MAX Replacement Filter Cartridge

    MAXVOC-975 Watts C-MAX Water Filter Cartridge

    $18.99
    MSRP: $22.99
    Save 17%
  • Whirlpool WHKF-GAC Undersink Replacement Water Filter Cartridge

    WHKF-GAC Whirlpool Undersink Replacement Filter Cartridge

    $10.99
    MSRP: $20.34
    Save 46%
  • KX-MATRIKX-1-20

    KX-MATRIKX-1-20

    $30.99
  • KX-MATRIKX-5-20

    KX-MATRIKX-5-20

    $43.99
  • KX-MATRIKX-CTO2-20

    KX-MATRIKX-CTO2-20

    $31.99
    MSRP: $32.19
    Save 1%
  • OMNIFILTER-SF200

    OMNIFILTER-SF200

    $26.99
  • OMNIPURE-ELFXL-1M

    OMNIPURE-ELFXL-1M

    $36.99
  • CBC-20 Pentek Replacement Filter Cartridge

Items 1 to 48 of 73 total

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