{"product_id":"attwood-66547-3-stainless-steel-straight-thru-hull-fitting-barbed-for-3-4-inch-id-hose","title":"Attwood 66547-3 Stainless Steel Straight Thru-Hull Fitting, 3\/4 Inch Hose Barb, NPSM Thread","description":"\u003cp\u003eThe Attwood 66547-3 is a straight stainless steel thru-hull valve fitting built for a permanent, corrosion-free through-hull connection below the waterline. It is a barbed, standard-length fitting sized for 3\/4-inch interior diameter hose, making it a common choice for bilge, washdown, live well, and other below-waterline plumbing runs where a secure, leak-resistant penetration is required.\u003c\/p\u003e\u003cp\u003eThe fitting uses a 3\/4-inch NPSM thread with a 1-inch thread outside diameter and a 2-inch thread length, paired with a 1 7\/8-inch flange diameter that seats against the hull surface. The hose barb measures 1 1\/4 inches long, and the fitting's total length is 3 3\/4 inches. Installation calls for a 1 1\/8-inch hole saw, and the fitting is rated for hulls up to a maximum thickness of 1 5\/8 inches. It has a machined finish and two ports for through-hull flow.\u003c\/p\u003e\u003cp\u003eConstructed of stainless steel for long-term durability in a marine environment, this fitting resists the corrosion that can compromise below-waterline hardware over time. It is sold as a single fitting.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Attwood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 66547-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e Thru-Hull Valve Fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Barb Size:\u003c\/strong\u003e 3\/4 Inch Interior Diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e 3\/4 Inch NPSM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Outside Diameter:\u003c\/strong\u003e 1 Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length:\u003c\/strong\u003e 2 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Diameter:\u003c\/strong\u003e 1 7\/8 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarb Length:\u003c\/strong\u003e 1 1\/4 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 3 3\/4 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Hole Saw Size:\u003c\/strong\u003e 1 1\/8 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Hull Thickness:\u003c\/strong\u003e 1 5\/8 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Ports:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5834 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size hose does the Attwood 66547-3 fit?\u003c\/strong\u003e The Attwood 66547-3 is a barbed fitting sized for 3\/4-inch interior diameter hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread does this thru-hull fitting use?\u003c\/strong\u003e It uses a 3\/4-inch NPSM thread, with a 1-inch thread outside diameter and a 2-inch thread length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hole saw size is needed to install the 66547-3?\u003c\/strong\u003e A 1 1\/8-inch hole saw is used to cut the mounting hole for the Attwood 66547-3.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum hull thickness this fitting will work with?\u003c\/strong\u003e The Attwood 66547-3 is rated for hulls up to a maximum thickness of 1 5\/8 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 66547-3 made from?\u003c\/strong\u003e It is made of stainless steel, chosen for corrosion resistance in below-waterline marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the fitting overall?\u003c\/strong\u003e The Attwood 66547-3 has a total length of 3 3\/4 inches, with a 1 1\/4-inch barb.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the flange diameter on this fitting?\u003c\/strong\u003e The flange diameter on the 66547-3 is 1 7\/8 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this fitting straight or angled?\u003c\/strong\u003e The 66547-3 is a straight thru-hull valve fitting, not an angled design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many ports does the 66547-3 have?\u003c\/strong\u003e This Attwood thru-hull fitting has two ports.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the finish on the Attwood 66547-3?\u003c\/strong\u003e It has a machined stainless steel finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 66547-3 weigh?\u003c\/strong\u003e The Attwood 66547-3 weighs 0.5834 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 66547-3 come as a single fitting?\u003c\/strong\u003e Yes, the Attwood 66547-3 is sold as a single thru-hull fitting.\u003c\/p\u003e","brand":"Attwood","offers":[{"title":"Default Title","offer_id":48989673160923,"sku":"ATT-66547-3","price":28.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/81zmV5CiUNL.jpg?v=1784487023","url":"https:\/\/www.goodvibesmarina.com\/products\/attwood-66547-3-stainless-steel-straight-thru-hull-fitting-barbed-for-3-4-inch-id-hose","provider":"Good Vibes Marina","version":"1.0","type":"link"}