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Groco BB-Series Backing Block
Seacock Sold Separately

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Groco BB-Series Backing Block

  • Applications: 3/4" and 1" Seacocks
  • Diameter: 4.29", Threaded Inserts: 5/16"-18
  • 1/2" Thick for a Secure Installation, Will Not Swell or Absorb Moisture
  • Item #: 
    Model #: 


    Shipping Weight: 
    0.05 Lbs.
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    Status:    null In Stock

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    • Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull
    • Each size fits multiple seacock sizes
    • Press threaded inserts into the hull side of the backing block into the holes that match the seacock flange
    • 1/2" thickness is rigid enough for a secure installation but flexible enough to conform to minor hull curvature
    • Will not swell or absorb moisture
    • Applications: 3/4" and 1" Seacocks
    • Diameter: 4.29", Threaded Inserts: 5/16"-18


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