![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/1280x1280/products/49438/90223/74173XL__44779.1642114017.jpg?c=1 "GROCO Backing Block f\/2\" 2-1\/2\" Seacocks [BB-3]")
![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/500x659/products/49438/90223/74173XL__44779.1642114017.jpg?c=1 "GROCO Backing Block f\/2\" 2-1\/2\" Seacocks [BB-3]")
Backing Block for 2" & 2-1/2" 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
Specifications:
- Construction: Bronze
- Box Dimensions: 1"H x 7"W x 7"L WT: 0.45 lbs
- UPC: 742985170155
- MPN:
- BB-3
![GROCO Backing Block f\/1-1\/4" 1-1\/2" Seacocks [BB-2]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/500x659/products/48835/89386/72848XL__68662.1642112658.jpg?c=1 "GROCO Backing Block f\/1-1\/4\" 1-1\/2\" Seacocks [BB-2]")
![GROCO Backing Block f\/3\/4" 1" Seacocks [BB-1]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/500x659/products/48834/89385/72847XL__81187.1642112656.jpg?c=1 "GROCO Backing Block f\/3\/4\" 1\" Seacocks [BB-1]")
![GROCO 2-1\/2" Safety Seacock w\/2" Side Port [SBV-2500-P]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/500x659/products/66159/114049/75374XL__95377.1670614949.jpg?c=1 "GROCO 2-1\/2\" Safety Seacock w\/2\" Side Port [SBV-2500-P]")
![GROCO 2-1\/2" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-2500]](https://cdn11.bigcommerce.com/s-2vfwgyus8b/images/stencil/500x659/products/73005/125421/102613XL__79275.1727370389.jpg?c=1 "GROCO 2-1\/2\" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-2500]")