![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/1280x1280/products/16956/19923/74173XL__09809.1610761083.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-7pxjm3qi5y/images/stencil/100x100/products/16956/19923/74173XL__09809.1610761083.jpg?c=1 "GROCO Backing Block f\/2\" 2-1\/2\" Seacocks [BB-3]")
Product Description
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
Product Videos
Custom Field
MPN BB-3
![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/16956/19923/74173XL__09809.1610761083.jpg?c=1 "GROCO Backing Block f\/2\" 2-1\/2\" Seacocks [BB-3]")
![GROCO Backing Block f\/1-1\/4" 1-1\/2" Seacocks [BB-2]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/16288/18956/72848XL__27839.1610759466.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-7pxjm3qi5y/images/stencil/500x659/products/16287/18955/72847XL__92006.1610759464.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-7pxjm3qi5y/images/stencil/500x659/products/34565/44580/75374XL__48949.1670617603.jpg?c=1 "GROCO 2-1\/2\" Safety Seacock w\/2\" Side Port [SBV-2500-P]")
![GROCO 1-1\/2" Bronze Flanged Full Flow Seacock [BV-1500]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/16285/18953/72844XL__98807.1610759460.jpg?c=1 "GROCO 1-1\/2\" Bronze Flanged Full Flow Seacock [BV-1500]")
![GROCO 1-1\/2" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-1500]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/17065/20042/74388XL__11274.1610761315.jpg?c=1 "GROCO 1-1\/2\" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-1500]")
![GROCO 1-1\/2" Bronze Electric Flanged Seacock - 12V [FBVE-1500 12V]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/17053/20030/74376XL__76607.1610761285.jpg?c=1 "GROCO 1-1\/2\" Bronze Electric Flanged Seacock - 12V [FBVE-1500 12V]")
![GROCO 1-1\/2" Bronze Electric Flanged Seacock - 24V [FBVE-1500 24V]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/17054/20031/74377XL__09553.1610761287.jpg?c=1 "GROCO 1-1\/2\" Bronze Electric Flanged Seacock - 24V [FBVE-1500 24V]")
![GROCO 1-1\/2" Ball Valve\/Seacock Raw Water Strainer Combo [BVS-1500]](https://cdn11.bigcommerce.com/s-7pxjm3qi5y/images/stencil/500x659/products/17078/20055/74401XL__72567.1610761341.jpg?c=1 "GROCO 1-1\/2\" Ball Valve\/Seacock Raw Water Strainer Combo [BVS-1500]")