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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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  • 4373529 Whirlpool Undersink Filter Replacement Cartridge

    4373529 Whirlpool Undersink Filter Replacement Cartridge

    $43.99 Retail Price:  $50.59
  • 4373574 Whirlpool Undersink Filter Kit
  • 4373575 Whirlpool Undersink Filter Kit

    4373575 Whirlpool Undersink Filter Kit

    Regular Price: $59.99

    Special Price: $52.05

  • 3M Aqua-Pure AP1001 Whole House Water Filter Cartridge
  • 3M Aqua-Pure AP-DW70 Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure APIL3R Inline Water Filter

    APIL3R 3M Aqua-Pure Inline Water Filter Cartridge

    $40.99 Retail Price:  $45.41
  • CB6 OmniFilter Whole House Filter Replacement Cartridge
  • CQE-CO-02028 Crystal Quest Commercial Reverse Osmosis Filter System
  • CQE-RC-04002 Crystal Quest PLUS Multi-Stage Replacement Filter Cartridge
  • P1-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)
  • CFS8112 Cuno Whole House Filter Replacement Cartridge

    CFS8112 Cuno Whole House Filter Replacement Cartridge

    $63.05 Retail Price:  $69.56
  • CFS8112-S Cuno Whole House Filter Replacement Cartridge

    CFS8112-S Cuno Whole House Filter Replacement Cartridge

    $70.99 Retail Price:  $94.29
  • CFS9112 Cuno Whole House Filter Replacement Cartridge

    CFS9112 Cuno Whole House Filter Replacement Cartridge

    Regular Price: $62.99

    Special Price: $52.05

  • CS-11 Cuno Replacement Filter Cartridge

    CS-11 Cuno Replacement Filter Cartridge

    $57.99 Retail Price:  $60.94
  • HC111-S Cuno Replacement Filter Cartridge

    HC111-S Cuno Replacement Filter Cartridge

    $35.99 Retail Price:  $43.69
  • HF25 Cuno Whole House Filter Replacement Cartridge

    HF25 Cuno Whole House Filter Replacement Cartridge

    Regular Price: $68.99

    Special Price: $49.05

  • HF25-S Cuno Whole House Filter Replacement Cartridge

    HF25-S Cuno Whole House Filter Replacement Cartridge

    $67.99 Retail Price:  $69.56
  • W9240001 Doulton Specialty Replacement Filter Cartridge
  • FX12P GE SmartWater Reverse Osmosis Filter Set

    FX12P GE SmartWater Reverse Osmosis Filter Set

    $58.99 Retail Price:  $71.29
  • HB-20-1W Harmsco Calypso Blue Replacement Filter Cartridge
  • SDC-45-1001 Hydronix Whole House Replacement Sediment Filter Cartridge
  • P1-30 Pentek Whole House Replacement Sediment Filter Cartridge

    P1-30 Pentek Whole House Sediment Water Filter

    $13.99 Retail Price:  $14.13
  • PD-1-20 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-1-40 Pentek Whole House Replacement Sediment Filter Cartridge
  • PD-1-934 Pentek Whole House Replacement Sediment Filter Cartridge
  • PS1-10C Pentek Whole House Replacement Sediment Filter Cartridge
  • WP1BB20P Pentek Whole House Filter Replacement Cartridge

    WP1BB20P Pentek Whole House Filter Replacement Cartridge

    $36.99 Retail Price:  $39.55
  • WP1BB97P Pentek Replacement Filter Cartridge
  • PX01-20 Purtrex Replacement Filter Cartridge

    PX01-20 Purtrex Replacement Water Filter Cartridge

    $7.99 Retail Price:  $10.34
  • PX01-30 Purtrex Sediment Filter Cartridge

    PX01-30 Purtrex Sediment Filter Cartridge

    $10.49 Retail Price:  $14.36
  • PX01-9-78 Purtrex Replacement Filter Cartridge

    PX01-9-78 Purtrex Replacement Filter Cartridge

    $4.99 Retail Price:  $8.04
  • 47-55707G2 Water Factory Systems Replacement Filter Cartridge
  • FXMLC-2PK GE SmartWater Faucet Filter Replacement Cartridge (2-Pack)
  • FXSLC GE SmartSetWater Undersink Filter
  • 41400010 Hydrotech Lead Filter
  • GX01-20 Hytrex Replacement Filter Cartridge

    GX01-20 Hytrex Water Filter Cartridge

    $8.99 Retail Price:  $12.64
  • GX01-30 Hytrex Replacement Filter Cartridge

    GX01-30 Hytrex Water Filter Cartridge

    $11.99 Retail Price:  $16.09
  • GX01-9-78 Hytrex Replacement Filter Cartridge

    GX01-9-78 Hytrex Replacement Water Filter Cartridge

    $5.49 Retail Price:  $8.61
  • 8014200 Katadyn Exstream XR Ultralight Series 28-Ounce Personal Water Purifier Bottle - Blue
  • K00338 Manitowoc Arctic Pure Ice Maker Filter

    K00338 Manitowoc Arctic Pure Ice Maker Filter

    $66.89 Retail Price:  $79.22
  • K00339 Manitowoc Arctic Pure Replacement Ice Maker Filter Cartridge

    K00339 Manitowoc Arctic Pure Ice Maker Filter Cartridge

    $88.99 Retail Price:  $130.99
  • K00374 Manitowoc Arctic Pure Replacement Ice Maker Filter Cartridge

    K00374 Manitowoc Arctic Pure Ice Maker Filter Cartridge

    $44.99 Retail Price:  $59.79

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