Groco Seacock Backing Block 3/4"-1" Seacocks GRO BB1

Groco Seacock Backing Block 3/4"-1" Seacocks GRO BB1

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.

Size: 4.29" Dia.
Fits: 3/4" & 1" Seacocks
Bolt: 5/16" - 18"

SKU: GRO BB1
Manufacturer: Groco
Category: Plumbing/Seacocks/