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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!

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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.

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  • TFM-24 Desal Reverse Osmosis Membrane

    TFM-24 Desal Reverse Osmosis Membrane

    $24.99 Retail Price:  $47.14
  • 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    $7.99 Retail Price:  $11.49
  • CFBC-20 Pentek Replacement Filter Cartridge

    CFBC-20 Pentek Replacement Water Filter Cartridge

    $23.49 Retail Price:  $29.31
  • KO50G4S Pentek Polypropylene Bag Filter

    KO50G4S Pentek Polypropylene Filter Bag

    $4.99 Retail Price:  $5.85
  • KO5G3S Pentek Polypropylene Bag Filter

    KO5G3S Pentek Polypropylene Filter Bags

    $4.99 Retail Price:  $7.00
  • OAC-20BB Pentek Oil Reduction Filter

    OAC-20BB Pentek Oil Reduction Water Filter

    $73.99 Retail Price:  $85.20
  • P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    $23.99 Retail Price:  $31.84
  • P-250A Pentek Undersink Filter Set

    P-250A Pentek Undersink Filter Set

    $23.99 Retail Price:  $31.27
  • P25 Pentek Whole House Replacement Sediment Filter Cartridge
  • RFC20-BB Pentek Replacement Filter Cartridge

    RFC20-BB Pentek Replacement Filter Cartridge

    $56.99 Retail Price:  $61.51
  • ROM-230TN Pentek Reverse Osmosis Membrane

    ROM-230TN Pentek Reverse Osmosis Membrane

    $75.99 Retail Price:  $86.93
  • ROM-26T Pentek Reverse Osmosis Membrane

    ROM-26T Pentek Reverse Osmosis Membrane

    $73.99 Retail Price:  $84.05
  • ST-1 Pentek Filter Housing - Stainless Steel

    ST-1 Pentek Filter Housing - Stainless Steel

    $167.99 Retail Price:  $191.81
  • ST-2 Pentek Filter Housing - Stainless Steel

    ST-2 Pentek Filter Housing - Stainless Steel

    $226.99 Retail Price:  $286.57
  • ST-3 Pentek Filter Housing - Stainless Steel

    ST-3 Pentek Filter Housing - Stainless Steel

    $283.99 Retail Price:  $345.79
  • ST-BC-4 Pentek Filter Housing - Stainless Steel

    ST-BC-4 Pentek Filter Housing - Stainless Steel

    $783.99 Retail Price:  $1009.11
  • ST-BC-8 Pentek Filter Housing - Stainless Steel

    ST-BC-8 Pentek Filter Housing - Stainless Steel

    $901.99 Retail Price:  $904.34
  • TS-101L Pentek Lime/Scale Inline Filter

    TS-101L Pentek Lime/Scale Inline Filter

    $11.99 Retail Price:  $15.28
  • WPX100BB97P Pentek Replacement Filter Cartridge

    WPX100BB97P Pentek Replacement Filter Cartridge

    $19.99 Retail Price:  $24.14
  • WPX50BB97P Pentek Replacement Filter Cartridge

    WPX50BB97P Pentek Replacement Filter Cartridge

    $20.99 Retail Price:  $24.14
  • WS-10 Pentek Water Softening Filter

    WS-10 Pentek Water Softening Filter

    $20.99 Retail Price:  $24.83

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