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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!
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  • 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 129 total

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  • AF-10-3690 Aries Replacement Fluoride Filter Cartridge

    AF-10-3690 Aries Replacement Fluoride Filter Cartridge

    $28.99
    MSRP: $32.19
    Save 10%
  • CQE-CT-00142 Crystal Quest Countertop Reverse Osmosis Filter System
  • CQE-RC-04002 Crystal Quest PLUS Multi-Stage Replacement Filter Cartridge
  • CQE-RC-04008 Crystal Quest Arsenic Filter Cartridge

    CQE-RC-04008 Crystal Quest Arsenic Filter Cartridge

    $70.99
    MSRP: $83.94
    Save 15%
  • CQE-RC-04049 Crystal Quest Fluoride Multi Replacement Filter Cartridge
  • CQE-RC-04051 Crystal Quest Arsenic Multi Replacement Filter Cartridge
  • DD-7098 Daewoo Inline Filter

    DD-7098 Daewoo Inline Filter

    $28.99
    MSRP: $31.34
    Save 7%
  • TLC-150EB Desal Encapsulated Reverse Osmosis Membrane
  • W9121214 Doulton ATC Super Sterasyl Replacement Element
  • W9121715 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121750 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9361122 Doulton Countertop Filter System

    W9361122 Doulton SS2 Countertop Filter System

    $199.97
    MSRP: $232.27
    Save 14%
  • EV9275-70 Everpure QL2-OW200L Filter System

    EV9275-70 Everpure QL2-OW200L Filter System

    $70.05
    MSRP: $124.19
    Save 44%
  • PCF1-10MB Pentek Whole House Filter Replacement Cartridge
  • TQ56-36FC PuROTwist PuROTwist Reverse Osmosis Membrane
  • W-1812-24 Watts Replacement Reverse Osmosis Membrane

    W-1812-24 Watts Reverse Osmosis Membrane Replacement

    $21.99
    MSRP: $40.24
    Save 45%
  • W-1812-36 Watts Replacement Reverse Osmosis Membrane

    W-1812-36 Watts Replacement Reverse Osmosis Membrane

    $28.99
    MSRP: $42.54
    Save 32%
  • WQCM11-50 Watts Kwik-Change Replacement Reverse Osmosis Membrane - Green
  • F5-CHROME Instapure Complete Faucet Filter System - Chrome
  • F5-WHITE Instapure Complete Faucet Filter System - White
  • R5-1PK Instapure Complete Faucet Filter Replacement Cartridge
  • R5-2PK Instapure Complete Faucet Filter Replacement Cartridge (2-Pack)
  • 8013618 Katadyn Camping Filter System

    8013618 Katadyn Camping Filter System

    $369.95
    MSRP: $427.74
    Save 14%
  • 8013624 Katadyn Replacement Filter Element (2-Pack)

    8013624 Katadyn Replacement Filter Element (2-Pack)

    $14.95
    MSRP: $19.49
    Save 23%
  • 8013629 Katadyn Camping Filter System
  • 8017763 Katadyn Camping Filter System

    8017763 Katadyn Camping Filter System

    $169.05
    MSRP: $255.24
    Save 34%
  • 8017764 Katadyn Microfilter System
  • TLC-350 Merlin Merlin Reverse Osmosis Membrane Element

    TLC-350 Merlin Merlin Reverse Osmosis Membrane Element

    $87.99
    MSRP: $105.79
    Save 17%
  • S1227RS Microline TFC Reverse Osmosis Membrane

    S1227RS Microline TFC Reverse Osmosis Membrane

    $57.99
    MSRP: $84.99
    Save 32%
  • S1229RS Microline TFC Reverse Osmosis Membrane

    S1229RS Microline TFC Reverse Osmosis Membrane

    $59.99
    MSRP: $71.29
    Save 16%
  • W9223022 Doulton Replacement Ceramic Filter

    W9223022 Doulton Ultracarb Replacement Ceramic Filter

    $70.99
    MSRP: $82.65
    Save 14%
  • W9123085 Doulton Imperial UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge
  • WQCCC11 Watts Kwik-Change Pre-Carbon Water Filter Cartridge
  • WQCHFC11 Watts Kwik-Change Hollow Fiber (UF) Water Filter Cartridge
  • WQCSC11 Watts Kwik-Change Sediment Filter Cartridge

    WQCSC11 Watts Kwik-Change Sediment Filter Cartridge

    $11.99
    MSRP: $16.09
    Save 25%
  • 31040 Hydrologic Stealth-RO200 Reverse Osmosis Water Filtration System

Items 1 to 48 of 129 total

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