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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.

27 Item(s)

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  • FRSS-2.5 Sterilight 2.5 GPM 1/2-inch Flow Restrictor
  • FRSS-2.5 Viqua 2.5 GPM 1/2-inch Flow Restrictor

    FRSS-2.5 Viqua 2.5 GPM 1/2-inch Flow Restrictor

    $69.99 Retail Price:  $90.00
  • S330RL Viqua Water Disinfection System UV Lamp

    S330RL Viqua Water Disinfection System UV Lamp

    $69.99 Retail Price:  $89.00
  • RWC-5 American Plumber Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure AP200 Under Sink Water Filter

    AP200 3M Aqua-Pure Undersink Water Filtration System

    Regular Price: $104.99

    Special Price: $87.05

  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge
  • C-CS-FF 3M Aqua-Pure Undersink Water Filter

    C-CS-FF 3M Aqua-Pure Undersink Water Filter Cartridge

    $43.99 Retail Price:  $48.06
  • HF40-S Cuno Whole House Filter Replacement Cartridge

    HF40-S Cuno Whole House Filter Replacement Cartridge

    $105.99 Retail Price:  $123.04
  • HF45-S Cuno Whole House Filter Replacement Cartridge

    HF45-S Cuno Whole House Filter Replacement Cartridge

    $103.99 Retail Price:  $120.39
  • TW30-1812-36 Filmtec Reverse Osmosis Membrane

    TW30-1812-36 Filmtec Reverse Osmosis Membrane

    $41.99 Retail Price:  $48.29
  • TW30-1812-75 Filmtec Reverse Osmosis Membrane
  • 3US-AS01 Filtrete Undersink Filter System

    3US-AS01 Filtrete Undersink Filter System

    $41.99 Retail Price:  $50.59
  • GXULQ GE Undersink Filter System

    GXULQ GE Undersink Filter System

    $55.99 Retail Price:  $70.14
  • GXULQR GE Undersink Water Filter Replacement Cartridge
  • K00174 Manitowoc Tri-Liminator Replacement Ice Maker Filter Cartridge

    K00174 Manitowoc Tri-Liminator Ice Maker Filter

    $85.99 Retail Price:  $94.29
  • FLOPLUS-10BB Pentek Replacement Filter Cartridge

    FLOPLUS-10BB Pentek Replacement Filter Cartridge

    $44.99 Retail Price:  $48.52
  • UV-110-1 Pentek UV System

    UV-110-1 Pentek UV System

    $339.89 Retail Price:  $393.17
  • WS-20BB Pentek Whole House Filter Replacement Cartridge

    WS-20BB Pentek Whole House Filter Replacement Cartridge

    $45.99 Retail Price:  $52.08
  • GK-1 Rainshowr Green Knight Hydroponic Dechlorinator

    GK-1 Rainshowr Green Knight Hydroponic Dechlorinator

    Regular Price: $64.99

    Special Price: $57.05

  • TFM-50-A Tier1 Reverse Osmosis Membrane

    TFM-50-A Tier1 Reverse Osmosis Membrane

    $45.99 Retail Price:  $55.19
  • MATRIKX-5-20 KX Technologies MatrikX Whole House Filter Replacement Cartridge
  • CBC-BB Pentek Whole House Filter Replacement Cartridge

    CBC-BB Pentek Whole House Filter Replacement Cartridge

    $42.99 Retail Price:  $44.26
  • DBC-10EX2 Pentek Replacement Filter Cartridge

    DBC-10EX2 Pentek Water Filter Cartridge Replacement

    $43.99 Retail Price:  $57.95
  • 3M AquaPure 3MFF101 Whole House Water Filter Cartridge

    3MFF101 3M Aqua-Pure Replacement Water Filter Cartridge

    $200.99 Retail Price:  $209.29
  • 3M AquaPure 3MFF100 Drinking Water Filter System
  • KDF55-10BB Tier1 Water Filter
  • KDF85-10BB Tier1 Water Filter

    KDF85-10BB Tier1 Water Filter

    $81.99 Retail Price:  $86.24

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