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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 225 total

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  • SB-2R Water Bottle Replacement Filters (2-Pack)

    SB-2R Water Bottle Replacement Filters (2-Pack)

    $7.05
    MSRP: $11.49
    Save 39%
  • 155014-43 Pentek Comparable Whole House Sediment Water Filter by Tier1
  • AP110 Aquapure Comparable Whole House Sediment Water Filter by Tier1
  • RFC-BBS-D Culligan Comparable Whole House Carbon Water Filter by Tier1
  • S1A-D Culligan Comparable Whole House Sediment Water Filter 2-Pack by Tier1
  • D-25 Culligan Under Sink Water Filter

    D-25 Culligan Under Sink Water Filter

    $11.99
    MSRP: $16.99
    Save 29%
  • ECP1-10 Pentek Replacement Filter Cartridge (30-Pack)
  • ECP1-20BB Pentek Replacement Filter Cartridge (6-Pack)
  • ECP1-BB Pentek Replacement Filter Cartridge (12-Pack)
  • ECP20-10 Pentek Replacement Filter Cartridge (30-Pack)
  • ECP20-20 Pentek Replacement Filter Cartridge (20-Pack)
  • ECP20-20 Pentek Replacement Filter Cartridge (6-Pack)
  • ECP20-20BB Pentek Replacement Filter Cartridge (6-Pack)
  • ECP20-BB Pentek Replacement Filter Cartridge (12-Pack)
  • ECP20-BB Pentek Replacement Filter Cartridge (20-Pack)
  • ECP20-BB Pentek Replacement Filter Cartridge (6-Pack)
  • ECP5-20 Pentek Replacement Filter Cartridge (20-Pack)
  • ECP5-20 Pentek Replacement Filter Cartridge (6-Pack)
  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter
  • Desal TFM-18-C Reverse Osmosis Membrane

    Desal TFM-18-C Reverse Osmosis Membrane

    $30.99
    MSRP: $38.99
    Save 21%
  • DGD-7525-20 Pentek Whole House Water Filter
  • Pentek ECP1-10 Replacement Water Filter Cartridge

    ECP1-10 Pentek Replacement Filter Cartridge

    $8.99 MSRP: $10.57
    Save 15%
  • Pentek ECP1-20BB Replacement Water Filter Cartridge

    ECP1-20BB Pentek Replacement Filter Cartridge

    $26.99 MSRP: $28.39
    Save 5%
  • Pentek ECP1-BB Replacement Water Filter Cartridge

    Pentek ECP1-BB Water Filter Cartridge Replacement

    $15.99 MSRP: $17.12
    Save 7%
  • Pentek ECP20-20 Replacement Water Filter Cartridge

    ECP20-20 Pentek Replacement Filter Cartridge

    $14.99 MSRP: $15.28
    Save 2%
  • Pentek ECP20-20BB Replacement Water Filter Cartridge
  • Pentek ECP20-BB Replacement Water Filter Cartridge

    ECP20-BB Pentek Replacement Filter Cartridge

    $15.99 MSRP: $17.70
    Save 10%
  • Pentek ECP50-20BB Replacement Water Filter Cartridge
  • Pentek EP-10 Replacement Water Filter Cartridge

    Pentek EP-10 Filter Cartridge Replacement

    $11.99 MSRP: $15.34
    Save 22%
  • Pentek EP-20 Replacement Water Filter Cartridge

    Pentek EP-20 Water Filter Cartridge Replacements

    $17.99 MSRP: $20.00
    Save 10%
  • EP-20BB Pentek Replacement Water Filter

    EP-20BB Pentek Replacement Filter Cartridge

    $47.99 MSRP: $62.83
    Save 24%
  • EP-BB Pentek Replacement Filter Cartridge

    EP-BB Pentek Replacement Filter Cartridge

    $27.99 MSRP: $32.32
    Save 13%
  • Pentek EPM-BB Replacement Water Filter Cartridge

    Pentek EPM-BB Water Filter Cartridge Replacement

    $26.99 MSRP: $34.49
    Save 22%
  • EP5-10 Tier1 Carbon Block Water Filter

    EP5-10 Tier1 Carbon Block Water Filter

    $8.49 MSRP: $11.49
    Save 26%
  • P5-20 Tier1 Sediment Water Filter

    P5-20 Tier1 Whole House Sediment Water Filter

    $4.99 MSRP: $9.19
    Save 46%
  • P5-20BB Tier1 Sediment Water Filter

    P5-20BB Tier1 Whole House Sediment Water Filter

    $12.97 MSRP: $25.76
    Save 50%
  • Pentek WP5BB97P Replacement Water Filter Cartridge
  • Pentek WS-10 Water Softening Water Filter

    Pentek WS-10 Water Softening Filter

    $19.99 MSRP: $24.83
    Save 19%
  • PX05-9-78 Purtrex Replacement Water Filter

    PX05-9-78 Purtrex Replacement Water Filter

    $5.79 MSRP: $8.04
    Save 28%

Items 1 to 48 of 225 total

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