{"product_id":"groco-bb-1-seacock-backing-block","title":"Groco BB-1 Seacock Backing Block for 3\/4\" \u0026 1\" Seacocks","description":"\u003cp\u003eThe Groco BB-1 backing block gives a 3\/4\" or 1\" flanged seacock a solid, even base against the hull. It sits between the seacock flange and the hull, spreading the load and giving the mounting bolts something secure to thread into.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits Groco 3\/4\" and 1\" flanged seacocks (FBV-750, FBV-1000) and flanged adapters (IBVF-750, IBVF-1000)\u003c\/li\u003e\n\u003cli\u003eDiameter: 4.29\"\u003c\/li\u003e\n\u003cli\u003eInsert threads: 5\/16\"-18\u003c\/li\u003e\n\u003cli\u003e1\/2\" thick: rigid enough for a secure installation, flexible enough to follow minor hull curvature\u003c\/li\u003e\n\u003cli\u003eMarine-grade PVC foam that won't swell or absorb moisture\u003c\/li\u003e\n\u003cli\u003eThreaded inserts press into the hull side of the block to match the seacock flange holes\u003c\/li\u003e\n\u003cli\u003eGroco part number: BB-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":67789538721970,"sku":"GRO-BB-1","price":69.93,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3028\/8562\/files\/GROCOBB-1BackingBlock.jpg?v=1792770859","url":"https:\/\/www.harbourchandler.ca\/products\/groco-bb-1-seacock-backing-block","provider":"The Harbour Chandler","version":"1.0","type":"link"}