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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.

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  • K5666-KK Omnipure Inline Fluoride Filter

    K5666-KK Omnipure Inline Fluoride Filter

    $38.99
    MSRP: $50.99
    Save 24%
  • Pentek NCP-20 Whole House Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP-250R Under Sink Water Filter

    AP-250R 3M Aqua-Pure Undersink Water Filter Cartridge

    $29.99
    MSRP: $41.39
    Save 28%
  • 3M Aqua-Pure AP-DW70 Undersink Filter Replacement Cartridge
  • CB3 OmniFilter Undersink Filter Replacement Cartridge
  • C-2 Culligan RV Filter Replacement Cartridge (2-Pack)
  • D-10-TWIN Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-15 Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • NCP-10 Culligan Whole House Filter Replacement Cartridge
  • RVF-10 Culligan RV Pre-Tank Exterior Filter

    RVF-10 Culligan RV Pre-Tank Exterior Filter

    $34.99
    MSRP: $38.51
    Save 9%
  • RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge
  • P-124B Cuno Whole House Filter Replacement Cartridge

    P-124B Cuno Whole House Water Filter Cartridge

    $97.05
    MSRP: $128.79
    Save 25%
  • W9121214 Doulton ATC Super Sterasyl Replacement Element
  • EV9275-70 Everpure QL2-OW200L Filter System

    EV9275-70 Everpure QL2-OW200L Filter System

    $70.05
    MSRP: $124.19
    Save 44%
  • EV9619-06 Everpure OW200L Replacement Filter Cartridge

    EV9619-06 Everpure OW200L Replacement Filter Cartridge

    $81.00
    MSRP: $95.45
    Save 15%
  • GAC-5 Pentek Replacement Filter Cartridge
  • TRC-MM SteriPEN Portable UV System
  • 47-55711G2 Water Factory Systems Whole House Replacement Filter Cartridge
  • Whirlpool WHKF-DB2 Undersink Replacement Water Filter Cartridge
  • WSK-1 Water Sentinel Replacement Water Filters (2-Pack)
  • WHEEDF Whirlpool UltraEase Water Filter Pack

    WHEEDF Whirlpool UltraEase Water Filter Pack

    $47.99
    MSRP: $59.79
    Save 20%
  • US-UF3R Culligan Ultrafiltration Replacement Water Filter Cartridge Set
  • WHERF Whirlpool Reverse Osmosis System Pre and Post Filter Set
  • Water Sentinel WSAQ-1 Drinking Water Filter Replacement

    Water Sentinel WSAQ-1 Drinking Water Filter Replacement

    $39.05
    MSRP: $54.99
    Save 29%

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