{"product_id":"groco-bb-1-bronze-backing-block-for-3-4-and-1-inch-seacocks","title":"Groco BB-1 Bronze Backing Block for 3\/4 and 1 Inch Seacocks","description":"\u003cp\u003eThe Groco BB-1 is a bronze backing block designed to reinforce and support 3\/4 inch and 1 inch seacocks at the hull or bulkhead. Installed behind the seacock body, the backing block spreads mounting loads across a wider area of the mounting surface, reducing stress concentration on the hull laminate or bulkhead material and helping the seacock installation resist vibration, impact, and the ongoing strain of thru-hull plumbing. Bronze construction gives the block strong corrosion resistance in salt and fresh water environments, matching the service life expected of the bronze seacocks and fittings it supports.\u003c\/p\u003e\u003cp\u003eThe BB-1 is intended for bulkhead mount applications and is sized to fit both 3\/4 inch and 1 inch seacock installations, making it a practical stocking item for boat builders, riggers, and owners performing seacock replacement or new below-the-waterline plumbing installs. Its flat block profile allows it to sit directly against the mounting surface, distributing clamping and bolt-through loads evenly beneath the seacock flange.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Groco\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e BB-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 9 inches L x 7 inches W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Bulkhead Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 3\/4 inch and 1 inch seacocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.18125 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Groco BB-1 backing block used for?\u003c\/strong\u003e The Groco BB-1 is a bronze backing block that reinforces the mounting point of a seacock, spreading load across the hull or bulkhead surface behind the seacock body.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat seacock sizes does the BB-1 fit?\u003c\/strong\u003e The BB-1 is sized for 3\/4 inch and 1 inch seacocks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the BB-1 backing block made from?\u003c\/strong\u003e Bronze, which provides strong corrosion resistance for below-the-waterline marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the BB-1 backing block?\u003c\/strong\u003e The BB-1 measures 9 inches long by 7 inches wide.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Groco BB-1 weigh?\u003c\/strong\u003e The BB-1 backing block weighs 0.18125 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the BB-1 backing block mounted?\u003c\/strong\u003e It is a bulkhead mount block, installed flat against the mounting surface behind the seacock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the BB-1 sold as a single piece?\u003c\/strong\u003e Yes, the Groco BB-1 is supplied as one bronze backing block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the BB-1 work with any brand of seacock?\u003c\/strong\u003e The BB-1 is sized for 3\/4 inch and 1 inch seacock installations generally; check that your seacock's mounting footprint matches the block's 9 inch by 7 inch dimensions before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy use a backing block with a seacock instead of mounting directly to the hull?\u003c\/strong\u003e A backing block like the BB-1 distributes clamping and bolt loads over a larger area, reducing stress on the hull or bulkhead compared to mounting a seacock directly against an unreinforced surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the BB-1 suitable for both saltwater and freshwater boats?\u003c\/strong\u003e Yes, its bronze construction resists corrosion in both saltwater and freshwater environments.\u003c\/p\u003e","brand":"Groco","offers":[{"title":"Default Title","offer_id":49033324331227,"sku":"GRO-BB-1","price":46.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/41pApzNQxbL.jpg?v=1785244763","url":"https:\/\/www.goodvibesmarina.com\/products\/groco-bb-1-bronze-backing-block-for-3-4-and-1-inch-seacocks","provider":"Good Vibes Marina","version":"1.0","type":"link"}