![GROCO Backing Block f\/3\/4" 1" Seacocks [BB-1]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/1280x1280/products/71044/72143/72847XL__98137.1735974746.jpg?c=1 "GROCO Backing Block f\/3\/4\" 1\" Seacocks [BB-1]")
![GROCO Backing Block f\/3\/4" 1" Seacocks [BB-1]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/500x659/products/71044/72143/72847XL__98137.1735974746.jpg?c=1 "GROCO Backing Block f\/3\/4\" 1\" Seacocks [BB-1]")
Backing Block for 3/4" & 1" 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 9"L WT: 0.2 lbs
- UPC: 742985169845
![GROCO Backing Block f\/2" 2-1\/2" Seacocks [BB-3]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/500x659/products/71409/72587/74173XL__10003.1735975696.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-dbaeft6mdz/images/stencil/500x659/products/71045/72144/72848XL__48861.1735974749.jpg?c=1 "GROCO Backing Block f\/1-1\/4\" 1-1\/2\" Seacocks [BB-2]")
![GROCO 1-1\/4" Bronze Flanged Full Flow Seacock [BV-1250]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/500x659/products/71041/72140/72843XL__84142.1735974739.jpg?c=1 "GROCO 1-1\/4\" Bronze Flanged Full Flow Seacock [BV-1250]")
![GROCO 1-1\/4" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-1250]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/500x659/products/71484/72668/74387XL__68676.1735975879.jpg?c=1 "GROCO 1-1\/4\" Bronze Tri-Flanged Ball Valve\/Seacock [FBV-1250]")
![GROCO 1-1\/4" Safety Seacock w\/1" Side Port [SBV-1250-P]](https://cdn11.bigcommerce.com/s-dbaeft6mdz/images/stencil/500x659/products/71870/73190/75371XL__58097.1735976931.jpg?c=1 "GROCO 1-1\/4\" Safety Seacock w\/1\" Side Port [SBV-1250-P]")