{"product_id":"groco-bb-2-seacock-backing-block-1250-1500-rigid-plastic-bulkhead-mount","title":"Groco BB-2 Seacock Backing Block, 1250-1500, Rigid Plastic Bulkhead Mount","description":"\u003cp\u003eThe Groco BB-2 is a rigid plastic backing block designed to reinforce the hull mounting surface behind a seacock or thru-hull fitting, spreading clamping load evenly and preventing the fitting from crushing or working loose against fiberglass or wood hull material over time. It is built for bulkhead mount installation, sitting between the hull interior surface and the seacock or valve body so that the mounting hardware bears against a flat, solid surface rather than an uneven or flexible hull laminate. The block is molded from durable plastic for corrosion resistance in the below-waterline marine environment where metal backing plates would be prone to galvanic and saltwater corrosion.\u003c\/p\u003e\u003cp\u003eThis backing block is identified as the 1250-1500 size and is intended for use with Groco thru-hull fittings and strainers in that size range. It measures 9 inches by 7 inches, giving it enough surface area to distribute load across the surrounding hull structure at a typical seacock installation point.\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-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Seacock Backing Block 1250-1500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Thru Hull Fittings and Strainers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial Feature:\u003c\/strong\u003e Rigid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Bulkhead Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 9 inches L x 7 inches W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 742985170148\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Groco BB-2 backing block used for?\u003c\/strong\u003e The Groco BB-2 is a rigid plastic backing block that mounts behind a seacock or thru-hull fitting to reinforce the hull surface at the mounting point and help spread clamping load evenly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the BB-2 backing block bulkhead mounted?\u003c\/strong\u003e Yes, the BB-2 uses a bulkhead mount configuration, sitting flush against the hull interior surface behind the thru-hull fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Groco BB-2 made of?\u003c\/strong\u003e It is made of rigid plastic, chosen for corrosion resistance in the below-waterline marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the BB-2 backing block?\u003c\/strong\u003e The Groco BB-2 measures 9 inches long by 7 inches wide.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Groco BB-2 weigh?\u003c\/strong\u003e The BB-2 backing block weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size thru-hull fitting is the BB-2 designed for?\u003c\/strong\u003e The BB-2 is designated as the 1250-1500 size backing block for use with Groco thru-hull fittings and strainers in that size range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the BB-2 backing block include mounting hardware?\u003c\/strong\u003e The listing for the Groco BB-2 covers the backing block itself; no separate hardware components are specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does a seacock need a backing block?\u003c\/strong\u003e A backing block like the BB-2 reinforces the hull behind a seacock so the fitting's mounting fasteners bear against a solid, flat surface instead of an uneven or flexible hull laminate, reducing the risk of the fitting working loose or cracking the hull over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Groco BB-2 genuine Groco or aftermarket?\u003c\/strong\u003e The BB-2 is a genuine Groco part, identified by the manufacturer part number BB-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of marine hardware does the BB-2 fall under?\u003c\/strong\u003e The Groco BB-2 is categorized under thru-hull fittings and strainers as a backing block accessory.\u003c\/p\u003e","brand":"Groco","offers":[{"title":"Default Title","offer_id":49033324298459,"sku":"GRO-BB-2","price":58.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/41vPLMIOwlL.jpg?v=1785244763","url":"https:\/\/www.goodvibesmarina.com\/products\/groco-bb-2-seacock-backing-block-1250-1500-rigid-plastic-bulkhead-mount","provider":"Good Vibes Marina","version":"1.0","type":"link"}