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Groco IBVF Series Flanged Adapter

Groco IBVF Series Flanged Adapter

  • Select Bottom and Top Port Thread Size
  • Material: Bronze
  • Allows Standard NPT In-line Valve to Be Used as a Seacock
  • Item #: 
    Model #: 
    Multiple Models Available
    Our Price:
    From: $36.99  To: $164.99
    36.99 164.99
    Please enter quantity below.
    Top Thread
    Bottom Thread
    Model #
    Shipping Weight
    3/4 Inch NPT (M)
    3/4 Inch NPS (F)
      1.15 Lbs.
      *In Stock!*
    Our Price: $36.99
    1 Inch NPT (M)
    1 Inch NPS (F)
      1.20 Lbs.
      *In Stock!*
    Our Price: $37.99
    1-1/4 Inch NPT (M)
    1-1/4 Inch NPS (F)
      1.85 Lbs.
      *In Stock!*
    Our Price: $39.99
    1-1/2 Inch NPT (M)
    1-1/2 Inch NPS (F)
      2.00 Lbs.
      *In Stock!*
    Our Price: $52.99
    2 Inch NPT (M)
    2 Inch NPS (F)
      3.00 Lbs.
      *In Stock!*
    Our Price: $64.99
    2-1/2 Inch NPT (M)
    2-1/2 Inch NPS (F)
      4.00 Lbs.
    Our Price: $118.99
    3 Inch NPT (M)
    3 Inch NPS (F)
      6.00 Lbs.
    Our Price: $164.99
    Click the "More Info" button above for specific information about that product.

    Click for an Installation Guide (PDF)

    Groco IBVF Series Flanged Adapters (Patent Pending) were developed to eliminate the common and dangerous problem of thread mismatch when NPT Inline valves are screwed directly to NPS-threaded thru-hulls.


    • Provides a safe and sturdy assembly when in-line valves are used as seacocks
    • Eliminates thread mismatch when in-line valves are screwed onto thru-hulls
    • Accepts standard NPS thru-hulls into the base and standard NPT in-line valves or other components on top
    • Prevents valve damage during engine or generator installation – the valve can be installed later
    • Makes future valve replacement a simple job (can even be done in the water when plugged from the outside)
    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to


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