Groco BB-Series Backing Block

Groco's BB-Series Backing Blocks improve the installation of a flanged seacock by creating a more secure connection through press threaded inserts and a flexible design that conforms to minor hull curvature.

Features:

• 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
• Includes threaded inserts that press into the hull side of each block
• 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

Note: Backing block includes brass inserts; stainless steel bolts are recommended

Specifications:

• 4.29"Applications: 750 & 1000 Seacocks (3/4"/1")
• 5.38"Applications: 1250 & 1500 Seacocks (1 1/4"/1 1/2")
• 7.13" Applications: 2000 & 2500 Seacocks (2"/2 1/2")
• 9.5" Applications: 3000 Seacocks (3"/4")
• Threaded inserts: 3/8"-16
• Thickness: 1/2"

Note: Seacock sold separately.