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When we protect your filter purchase with our No Worries Guarantee, we mean it!

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  • 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.

47 Item(s)

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  • HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    $13.99 Retail Price:  $19.99
  • WB-20-W Harmsco Pleated Commercial Water Filter Cartridge
  • WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge
  •  WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge
  • CW-MF Pentek Whole House Filter Replacement Cartridge (6-Pack)
  • 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

  • Harmsco PO-25-G1PS-EA Polypropylene Filter Bag

    Harmsco PO-25-G1PS-EA Polypropylene Filter Bag

    $18.99 Retail Price:  $21.34
  • 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    $7.99 Retail Price:  $11.49
  • HB-10-5W Harmsco Calypso Blue Replacement Filter Cartridge
  • HB-20-1W Harmsco Calypso Blue Replacement Filter Cartridge
  • HB-20-20W Harmsco Calypso Blue Replacement Filter Cartridge
  • HB-20-50W Harmsco Calypso Blue Replacement Filter Cartridge
  • HB-20-5W Harmsco Calypso Blue Replacement Filter Cartridge
  • HC40-5 Harmsco Replacement Filter Cartridge

    HC40-5 Harmsco Replacement Filter Cartridge

    $92.99 Retail Price:  $95.34
  • PO-25-G2PS-EA Harmsco Bag Filter

    PO-25-G2PS-EA Harmsco Filter Bag

    $22.99 Retail Price:  $25.34
  • PP-S-1 Harmsco Replacement Filter Cartridge

    PP-S-1 Harmsco Replacement Filter Cartridge

    $19.49 Retail Price:  $24.71
  • 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
  • WS-20BB Pentek Whole House Filter Replacement Cartridge

    WS-20BB Pentek Whole House Filter Replacement Cartridge

    $45.99 Retail Price:  $52.08
  • BBF1-20MB Pentek Whole House Filter Replacement Cartridge

    BBF1-20MB Pentek Whole House Filter Replacement Cartridge

    $89.99 Retail Price:  $144.23
  • 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
  • CFB-Plus10 Pentek Replacement Filter Cartridge

    CFB-Plus10 Pentek Replacement Water Filter Cartridge

    $9.99 Retail Price:  $14.13
  • 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
  • PP-BB-10-1 Harmsco Calypso Blue Water Filter

    PP-BB-10-1 Harmsco Calypso Blue Water Filter

    $39.99 Retail Price:  $58.64

47 Item(s)

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