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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!

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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. WS-21 Water Sentinel Misting System Replacement Filter

    WS-21 Water Sentinel Misting System Filter

    Regular Price: $12.99

    Special Price: $12.05

  2. WSQC-2 WaterSentinel Reverse Osmosis Carbon GAC Filter Cartridge
  3. WSRV-8 Water Sentinel Inline RV Water Filter

    WSRV-8 Water Sentinel Inline RV Water Filter

    $31.99 Retail Price:  $36.79
  4. PGE-2 Water Sentinel ProGuard Swamp Cooler Replacement Filter Cartridge

    PGE-2 Water Sentinel ProGuard Swamp Cooler Replacement Filter Cartridge

    Fits right inside your swamp cooler's water pan Learn More
    $17.99 Retail Price:  $22.99
  5. WSK-1 Water Sentinel Replacement Water Filters (2-Pack)

    WSK-1 Water Sentinel Replacement Water Filters (2-Pack)

    Fits select Ecowater, Whirlpool or Kenmore water filtration systems Learn More
    $26.99 Retail Price:  $33.34
  6. Water Sentinel WSAQ-1 Drinking Water Filter Replacement

    Water Sentinel WSAQ-1 Drinking Water Filter Replacement

    Fits Aquasana drinking water filter systems AQ-4000, AQ-4025, AQ-4500, and AQ-4501 Learn More
    $42.99 Retail Price:  $54.99

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