Groco BB-2 Backing Block F114" Amp; 112" Seacocks
by GROCO

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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