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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. CNTP-DV-14C Tier1 Diverter Valve

    CNTP-DV-14C Tier1 Diverter Valve

    Fits various countertop reverse osmosis systems Learn More
    $8.99 Retail Price:  $13.90
  2. M100 Tier1 Plastic Hex Nipple

    M100 Tier1 Plastic Hex Nipple

    Fits standard 1-inch water lines and FPT connections Learn More
    $3.49 Retail Price:  $6.31
  3. M34 Tier1 Plastic Hex Nipple

    M34 Tier1 Plastic Hex Nipple

    Fits standard 3/4-inch water lines and FPT connections Learn More
    $2.99 Retail Price:  $5.74
  4. PFR402Q-500 Tier1 Inline Flow Restrictor

    PFR402Q-500 Tier1 Inline Flow Restrictor

    Fits standard 1/4-inch water lines Learn More
    $7.99 Retail Price:  $11.49
  5. 1SA Rusco Spigot Adapter Bushing

    1SA Rusco Spigot Adapter Bushing

    Built to fit onto a 1-inch pipe Learn More
    $3.99 Retail Price:  $6.89
  6. 155003 Pentek Water Filter Cartridge Coupler

    155003 Pentek Water Filter Cartridge Coupler

    For use with open-end water filter cartridges, 2.5 inches wide Learn More
    $3.99 Retail Price:  $11.49
  7. PI2308S Tier1 Two-Way Divider (1/4 Inch with Quick Connect Fittings)

    PI2308S Tier1 Two-Way Divider (1/4 Inch with Quick Connect Fittings)

    Attaches to 1/4 inch tubing Learn More
    $1.99 Retail Price:  $3.44
  8. ASV-14QW Tier1 Automatic Shut-Off Valve

    ASV-14QW Tier1 Automatic Shut-Off Valve

    Fits standard 1/4-inch water lines Learn More
    $7.99 Retail Price:  $11.49
  9. W2395982 Doulton Replacement Knob
  10. 3M Aqua-Pure 68998-31 Water Filter Coupler

    68998-31 3M Aqua-Pure Water Filter Coupler

    $4.99 Retail Price:  $8.96
  11. W2110880 Doulton Candle Replacement Washer

    W2110880 Doulton Ceramic Candle Filter Replacement Washer

    Fits all Doulton long mount filter candles Learn More
    $3.99 Retail Price:  $6.34
  12. W2395740 Doulton Cobra Clip
  13. W2395809 Doulton Grommet

    W2395809 Doulton Grommet For Gravity Filters

    $2.99 Retail Price:  $3.32

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