Discount Water Filters and Air Filters at Discount Filter

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!
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Water Filter Adapters & Couplers

Sometimes the smallest items can have the largest impact on the quality of your water.  At Discount Filter Store, you’ll find all the small water filter adapters and couplers you need, from diverter valves, automatic shut off valves, to refrigerator water filter caps, flow restrictors, and more; everything you need to keep your water filters operating at maximum efficiency. 

Searching for more water filter parts & accessories, check out our huge selection of mounting brackets, pumps & motors, drinking water test kits, and more.

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  1. W2391068 Doulton Diverter valve

    W2391068 Doulton Diverter Valve For Countertop Water Filters

    Fits all Doulton plastic countertop (HCP) water filtration systems Learn More
    $34.00 MSRP:  $39.34
  2. W2110880 Doulton Candle Replacement Washer

    W2110880 Doulton Ceramic Candle Filter Replacement Washer

    Fits all Doulton long mount filter candles Learn More
  3. W2395740 Doulton Cobra Clip
  4. W2395809 Doulton Grommet
  5. W2395982 Doulton Replacement Knob

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