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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. P5-478 Pentek Comparable Sediment Water Filter by Tier1

    P5-478 Pentek Comparable Sediment Water Filter by Tier1

    Fits standard filter housings using 5 x 2.5-inch filters Learn More
    $4.99 Retail Price:  $7.99
  2. EP-5 Pentek Replacement Filter Cartridge

    EP-5 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 5-inch x 2.5-inch water filter cartridges Learn More
    $6.99
  3. P5-478 Pentek Undersink Filter Replacement Cartridge

    P5-478 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 5-inch x 2 1/2-inch replacement filter cartridges Learn More
    $6.99 Retail Price:  $8.15
  4. R30-478 Pentek Undersink Filter Replacement Cartridge

    R30-478 Pentek Undersink Filter Replacement Cartridge

    Fits Pentek housings that use compact 4 7/8-inch x 2 5/8-inch replacement filter cartridges Learn More
    $8.99 Retail Price:  $12.75
  5. PX05-4-78 Purtrex Replacement Filter Cartridge

    PX05-4-78 Purtrex Replacement Water Filter Cartridge

    For use in filtration system housings that accept 2.5-inch x 5-inch replacement filters Learn More
    $2.99 Retail Price:  $5.74
  6. C2 Pentek Undersink Filter Replacement Cartridge

    C2 Pentek Undersink Filter Replacement Cartridge

    Fits in compact 5-inch water filter housings Learn More
    $7.99 Retail Price:  $8.84
  7. CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    Fits in compact 5-inch water filter housings Learn More
    $9.99 Retail Price:  $16.55
  8. CB-25-0505 Hydronix Replacement Carbon Water Filter

    CB-25-0505 Hydronix Replacement Carbon Water Filter

    Sized 4 7/8 inches by 2.75 inches, 5 micron Learn More
    $4.99 Retail Price:  $8.04
  9. SDC-25-0501 Hydronix Sediment Water Filter Cartridge

    SDC-25-0501 Hydronix Sediment Water Filter Cartridge

    1 micron filter, sized 5 x 2.5 inches Learn More
    $6.99 Retail Price:  $9.34
  10. SDC-25-0510 Hydronix Sediment Water Filter Cartridge

    SDC-25-0510 Hydronix Sediment Water Filter Cartridge

    10 micron filter, sized 2 1/2 x 4 7/8 inches Learn More
    $5.99 Retail Price:  $8.34
  11. P10-5 Tier1 Polypropylene Sediment Filter

    P10-5 Tier1 Polypropylene Sediment Filter

    Sized 4 7/8 x 2 1/2 inches Learn More

    Regular Price: $4.99

    Special Price: $2.55

  12. P1-5 Tier1 Sediment Filter Cartridge

    P1-5 Tier1 Sediment Filter Cartridge

    Sized 4 7/8 x 2 1/2 inches Learn More

    Regular Price: $5.99

    Special Price: $2.05

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