Multiple Models Available
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.
- 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
- Select dimensions and seacock application
- Thickness: 1/2"
Groco TH-Series Bronze Mushroom Head Thru-Hull Fitting
Item #: 502918
Groco FBV Series Full-Flow Flanged Ball Type Seacock
Item #: 503591
Groco BV Series Full Flow Ball-Type Seacock
Item #: 503592