![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-w82mks2psf/images/stencil/1280x1280/products/23613/23770/74173XL__93528.1548209882.jpg?c=2 "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-w82mks2psf/images/stencil/500x659/products/23613/23770/74173XL__93528.1548209882.jpg?c=2 "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: 0.39 lbs
- UPC: 742985170155
![GROCO Backing Block f\/1-1\/4" 1-1\/2" Seacocks [BB-2]](https://cdn11.bigcommerce.com/s-w82mks2psf/images/stencil/500x659/products/23605/23762/72848XL__23805.1548209818.jpg?c=2 "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-w82mks2psf/images/stencil/500x659/products/23604/23761/72847XL__95801.1548209814.jpg?c=2 "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-w82mks2psf/images/stencil/500x659/products/43616/56464/75374XL__18895.1670615183.jpg?c=2 "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-w82mks2psf/images/stencil/500x659/products/50508/67794/102613XL__32362.1727365404.jpg?c=2 "GROCO 2-1\/2\" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-2500]")