GROCO Backing Block f/1-1/4" & 1-1/2" Seacocks

Backing Block for 1-1/4" & 1-1/2" Seacocks

Features:

• Each size fits multiple seacock sizes


• Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange


• Rigid 1/2" thickness provides secure installation but is flexible enough to conform to minor hull curvature


• Will not swell or absorb moisture


• Made from an environmentally friendly PVC foam specially formulated for marine applications