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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.

27 Item(s)

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  • 2186494B Whirlpool Refrigerator Water Filter Cap - Black
  • CNTP-DV-14C Tier1 Diverter Valve

    CNTP-DV-14C Tier1 Diverter Valve

    $8.99
    MSRP: $13.90
    Save 35%
  • M100 Tier1 Plastic Hex Nipple

    M100 Tier1 Plastic Hex Nipple

    $3.49
    MSRP: $6.31
    Save 45%
  • M34 Tier1 Plastic Hex Nipple

    M34 Tier1 Plastic Hex Nipple

    $2.99
    MSRP: $5.74
    Save 48%
  • PFR402Q-150 Tier1 Inline Flow Restrictor

    PFR402Q-150 Tier1 Inline Flow Restrictor

    $10.99
    MSRP: $13.79
    Save 20%
  • PFR402Q-500 Tier1 Inline Flow Restrictor

    PFR402Q-500 Tier1 Inline Flow Restrictor

    $7.99
    MSRP: $11.49
    Save 30%
  • QMP502-38 Tier1 Compression Diverter Valve

    QMP502-38 Tier1 Compression Diverter Valve

    $12.99
    MSRP: $17.24
    Save 25%
  • W2391068 Doulton Diverter valve
  • 1SA Rusco Spigot Adapter Bushing

    1SA Rusco Spigot Adapter Bushing

    $3.99
    MSRP: $6.89
    Save 42%
  • 155003 Pentek Water Filter Cartridge Coupler

    155003 Pentek Water Filter Cartridge Coupler

    $3.99
    MSRP: $11.49
    Save 65%
  • PI2308S Tier1 Two-Way Divider (1/4 Inch with Quick Connect Fittings)
  • ELF-VALVED-HEAD-KK Omnipure Valved Water Filter Head

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

    $17.99
    MSRP: $22.99
    Save 22%
  • ASV-ERP-JG Tier1 Automatic Shut-Off Valve

    ASV-ERP-JG Tier1 Automatic Shut-Off Valve

    $17.99
    MSRP: $22.99
    Save 22%
  • ASV-14QW Tier1 Automatic Shut-Off Valve

    ASV-14QW Tier1 Automatic Shut-Off Valve

    $7.99
    MSRP: $11.49
    Save 30%
  • W2395982 Doulton Replacement Knob
  • 2186494W Whirlpool Refrigerator Water Filter Cap - White
  • 2260518B Whirlpool PUR Refrigerator Water Filter Cap - Black
  • 2260518W Whirlpool PUR Refrigerator Water Filter Cap - White
  • ADAPTER GE SmartWater Filter Adapter
  • 3M Aqua-Pure 68998-31 Water Filter Coupler

    68998-31 3M Aqua-Pure Water Filter Coupler

    $4.99
    MSRP: $8.96
    Save 44%
  • BF-34 Culligan Brass Fitting Kit
  • FVK-100 Culligan Inline Water Filter Flush Valve Kit

    FVK-100 Culligan Inline Water Filter Flush Valve Kit

    $14.99
    MSRP: $19.54
    Save 23%
  • RV-BYP-EZ Culligan RV Bypass Fitting Adapter
  • W2110880 Doulton Candle Replacement Washer
  • W2395740 Doulton Cobra Clip
  • W2395809 Doulton Grommet

    W2395809 Doulton Grommet For Gravity Filters

    $2.99
    MSRP: $3.32
    Save 10%
  • Hydrologic 3/4-inch Male Pipe to Male Garden Hose Thread Connector

27 Item(s)

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