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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!
  • Our customer service team is guaranteed to answer your call!
  • 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.

46 Item(s)

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  • CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge (12-Pack)
  • CW-MF Pentek Whole House Filter Replacement Cartridge (30-Pack)
  • PENTEK_CW_MF_6_PACK

    PENTEK_CW_MF_6_PACK

    $40.99

  • ECP5-BB Pentek Whole House Filter Replacement Cartridge (12-Pack)
  • PENTEK_ECP5_BB_20_PACK

    PENTEK_ECP5_BB_20_PACK

    $254.99

  • P5-20 Pentek Whole House Filter Replacement Cartridge (12-Pack)
  • Pentek CHLORPLUS-10 Whole House Water Filter Replacement Cartridge
  • Pentek CW-MF Whole House Water Filter Replacement Cartridge

    CW-MF Pentek Whole House Filter Replacement Cartridge

    As Low As $5.60 Per Filter

  • ECP5-BB Pentek Whole House Water Filter

    ECP5-BB Pentek Whole House Filter Replacement Cartridge

    As Low As $10.20 Per Filter

  • Pentek ECP50-BB Whole House Water Filter Replacement Cartridge
  • EPM-20 Pentek Whole House Water Filter

    EPM-20 Pentek Whole House Filter Replacement Cartridge

    As Low As $12.00 Per Filter

  • Pentek NCP-20 Whole House Water Filter Replacement Cartridge

    NCP-20 Pentek Whole House Filter Replacement Cartridge

    As Low As $13.00 Per Filter

  • NCP-BB Pentek Whole House Water Filter

    NCP-BB Pentek Whole House Filter Replacement Cartridge

    As Low As $32.00 Per Filter

  • Pentek P1-20 Whole House Water Filter Replacement Cartridge

    P1-20 Pentek Whole House Filter Replacement Cartridge

    As Low As $9.75 Per Filter

  • Pentek P1 Polyproplyene Water Filter (10 x 2 1/2)

    P1 Pentek Whole House Filter Replacement Cartridge

    As Low As $5.60 Per Filter

  • Pentek S1 Pleated Whole House Sediment Filter
  • Pentek S1-BB Replacement Water Filter Cartridge

    S1-BB Pentek Replacement Filter Cartridge

    As Low As $5.40 Per Filter

  • W20CLA American Plumber Whole House Sediment Filter Cartridge (2-Pack)
  • W25P American Plumber Whole House Sediment Filter Cartridge (2-Pack)
  • AMERICAN-PLUMBER-W30PE

    AMERICAN-PLUMBER-W30PE

    $16.99 Retail Price:  $18.04
  • AMERICAN-PLUMBER-W50PE

    AMERICAN-PLUMBER-W50PE

    $16.99 Retail Price:  $18.39
  • AMERICAN-PLUMBER-W50W

    AMERICAN-PLUMBER-W50W

    $13.99
  • AMERICAN-PLUMBER-W5CIP

    AMERICAN-PLUMBER-W5CIP

    $21.99
  • AMERICAN-PLUMBER-W5P

    AMERICAN-PLUMBER-W5P

    $12.99 Retail Price:  $13.79
  • W5W American Plumber Whole House Sediment Filter Cartridge (2-Pack)
  • AMERICAN-PLUMBER-WPD-110
  • AMERICAN-PLUMBER-WRC25HD

    AMERICAN-PLUMBER-WRC25HD

    $35.99 Retail Price:  $39.99
  • WRC25HD20 American Plumber Whole House 20-inch Heavy Duty Filter Cartridge
  • EPM-10 Pentek Undersink Filter Replacement Cartridge

    EPM-10 Pentek Undersink Filter Replacement Cartridge

    $9.99 Retail Price:  $10.57
  • GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    $12.99 Retail Price:  $17.99
  • NCP-10 Pentek Undersink Filter Replacement Cartridge

    NCP-10 Pentek Undersink Filter Replacement Cartridge

    $9.99 Retail Price:  $11.95
  • PCF1-10MB Pentek Whole House Filter Replacement Cartridge
  • PCF1-20MB Pentek Whole House Filter Replacement Cartridge
  • PD-5-934 Pentek Undersink Filter Replacement Cartridge

    PD-5-934 Pentek Undersink Filter Replacement Cartridge

    $9.99 Retail Price:  $12.34
  • PD-50-934 Pentek Whole House Filter Replacement Cartridge
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99 Retail Price:  $24.60
  • WP-30 Pentek Whole House Filter Replacement Cartridge

    WP-30 Pentek Whole House Filter Replacement Cartridge

    $6.99 Retail Price:  $8.15
  • PENTEK-WS-20BB

    PENTEK-WS-20BB

    $45.99 Retail Price:  $52.08
  • PENTEK-BBF1-20MB

    PENTEK-BBF1-20MB

    $89.99 Retail Price:  $112.23
  • C1 Pentek Undersink Filter Replacement Cartridge

    C1 Pentek Undersink Filter Replacement Cartridge

    $12.99 Retail Price:  $15.34
  • CBR2-10 Pentek Undersink Filter Replacement Cartridge
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $14.99 Retail Price:  $15.34
  • CCBC-10 Pentek Undersink Filter Replacement Cartridge

    CCBC-10 Pentek Undersink Filter Replacement Cartridge

    $18.99 Retail Price:  $19.31
  • CRE-1 Pentek Undersink Filter Replacement Cartridge

    CRE-1 Pentek Undersink Filter Replacement Cartridge

    $23.99 Retail Price:  $30.69
  • CW-50 Pentek Whole House Filter Replacement Cartridge

    CW-50 Pentek Whole House Filter Replacement Cartridge

    $6.99 Retail Price:  $10.34
  • ECP5-10 Pentek Undersink Filter Replacement Cartridge

    ECP5-10 Pentek Undersink Filter Replacement Cartridge

    $8.99 Retail Price:  $9.42

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