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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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  1. 4002573/GRO-36EN Pentair GPD Encapsulated Membrane

    4002573/GRO-36EN Pentair GPD Encapsulated Membrane

    Used in most conventional units Learn More
    $74.99 Retail Price:  $90.54
  2. 4002574/GRO-50EN Pentair GPD Encapsulated Membrane
  3. Pentair HEPP10-40DB Pureflex High Efficiency

    Pentair HEPP10-40DB Pureflex High Efficiency

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $93.99 Retail Price:  $113.99
  4. Pentair HEPP10-30DB Pureflex High Efficiency Cartridge

    Pentair HEPP10-30DB Pureflex High Efficiency Cartridge

    Fits standard filter housings that accept 30 x 2.5-inch filters Learn More
    $107.99 Retail Price:  $130.99
  5. Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $49.99 Retail Price:  $61.99
  6. Pentair NEPP12-20DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP12-20DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 20 x 2.5-inch filters Learn More
    $77.99 Retail Price:  $94.99
  7. Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $41.99 Retail Price:  $52.99
  8. Pentair NEPP2-20DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP2-20DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 20 x 2.5-inch filters Learn More
    $62.99 Retail Price:  $77.99
  9. Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 40 x 2.5-inch filters Learn More
    $52.99 Retail Price:  $67.99
  10. Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 30 x 2.5-inch filters Learn More
    $57.99 Retail Price:  $72.99
  11. WP-5 Pentek Replacement Filter Cartridge

    WP-5 Pentek Replacement Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $7.99 Retail Price:  $8.84
  12. WP5BB20P Pentek Replacement Filter Cartridge

    WP5BB20P Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $35.99 Retail Price:  $42.54
  13. WS-10 Pentek Water Softening Filter

    WS-10 Pentek Water Softening Filter

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $20.99 Retail Price:  $24.83
  14. WS-20 Pentek Water Softening Filter

    WS-20 Pentek Water Softening Filter

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $26.99 Retail Price:  $35.64
  15. RFFE20-BB Pentek Iron Reducing Water Filter Cartridge

    RFFE20-BB Pentek Iron Reducing Water Filter Cartridge (20 in x 4.5 in)

    Built to fit into 20-inch Big Blue water filtration systems Learn More
    $75.99 Retail Price:  $90.84

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