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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. 2186494B Whirlpool Refrigerator Water Filter Cap - Black

    2186494B Whirlpool Refrigerator Water Filter Cap - Black

    Built to fit into Whirlpool, KitchenAid, Maytag and Kenmore side-by-side refrigerator models that use a quarter-turn water filter in the bottom grille Learn More
    $13.99 Retail Price:  $17.24
  2. PFR402Q-150 Tier1 Inline Flow Restrictor

    PFR402Q-150 Tier1 Inline Flow Restrictor

    Fits standard 1/4-inch water lines Learn More
    $10.99 Retail Price:  $13.79
  3. QMP502-38 Tier1 Compression Diverter Valve

    QMP502-38 Tier1 Compression Diverter Valve

    Fits standard 3/8-inch water lines Learn More
    $12.99 Retail Price:  $17.24
  4. ELF-VALVED-HEAD-KK Omnipure Valved Water Filter Head

    ELF-VALVED-HEAD-KK Omnipure Valved Water Filter Head

    Accepts all Omnipure water filters in the E, ELF and ELF-XL Series Learn More
    $17.99 Retail Price:  $22.99
  5. ASV-ERP-JG Tier1 Automatic Shut-Off Valve

    ASV-ERP-JG Tier1 Automatic Shut-Off Valve

    Fits standard 1/4-inch water lines Learn More
    $17.99 Retail Price:  $22.99
  6. 2186494W Whirlpool Refrigerator Water Filter Cap - White

    2186494W Whirlpool Refrigerator Water Filter Cap - White

    For use in side-by-side refrigerator models from Whirlpool, KitchenAid, Maytag and Kenmore that use a quarter turn filter, installed in white the lower bottom grille Learn More
    $12.99 Retail Price:  $17.24
  7. 2260518W Whirlpool PUR Refrigerator Water Filter Cap - White

    2260518W Whirlpool PUR Refrigerator Water Filter Cap - White

    Replacement part designed to match caps used in the white bottom grille of Whirlpool, KitchenAid, Kenmore, Amana, Maytag and Jenn-Air side-by-side refrigerator models with a push-button filter Learn More
    $16.99 Retail Price:  $27.59
  8. ADAPTER GE SmartWater Filter Adapter
  9. BF-34 Culligan Brass Fitting Kit

    BF-34 Culligan Brass Fitting Kit

    Fits 1/2-inch and 3/4-inch pipe Learn More
  10. FVK-100 Culligan Inline Water Filter Flush Valve Kit

    FVK-100 Culligan Inline Water Filter Flush Valve Kit

    Fits Culligan in-line refrigerator filters including IC-750 and IC-1000 Learn More
    $14.99 Retail Price:  $19.54
  11. RV-BYP-EZ Culligan RV Bypass Fitting Adapter

    RV-BYP-EZ Culligan RV Bypass Fitting Adapter

    Fits Culligan Easy-Change filter systems including RV-EZ-1, RV-EZ-2, and RV-EZ-4 Learn More
  12. Hydrologic 3/4-inch Male Pipe to Male Garden Hose Thread Connector

    Hydrologic 3/4-inch Male Pipe to Male Garden Hose Thread Connector (#14186)

    Fits 3/4-inch MNPT and MGH threads Learn More
    $12.99 Retail Price:  $19.99

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