{"product_id":"attwood-3873-3-thru-hull-fitting-white-fits-3-4-id-hose","title":"Attwood Thru-Hull Fitting for 3\/4 Inch Hose, White, 3873-3","description":"\u003cp\u003eThe attwood 3873-3 is a thru-hull fitting designed to create a secure, reliable connection point where plumbing or drainage hose passes through a boat's hull. Built in white polypropylene, it resists corrosion and UV exposure better than metal alternatives, making it well suited to bilge pump discharge, livewell drains, washdown lines, and other below-waterline plumbing runs. The fitting is sized for 3\/4 inch inside diameter hose, with a stem length of 3-1\/4 inches to pass through hull material and a flange diameter of 2-1\/4 inches to seat against the hull surface and spread clamping load evenly. It accommodates a maximum hull thickness of 1-1\/4 inches, covering typical fiberglass and composite hull sections found on small to mid-size boats.\u003c\/p\u003e\u003cp\u003eInstallation follows standard thru-hull practice: the stem passes through a drilled hole in the hull, the flange seats against the exterior or interior surface with appropriate marine sealant, and the hose clamps directly onto the barbed stem. The white finish blends with common hull gelcoat colors, and the polypropylene construction is lightweight, will not corrode, and holds up to continuous exposure to fresh and salt water.\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 3873-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thru-Hull Fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polypropylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Inside Diameter:\u003c\/strong\u003e 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Length:\u003c\/strong\u003e 3-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Hull Thickness:\u003c\/strong\u003e 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Diameter:\u003c\/strong\u003e 2-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size hose does the attwood 3873-3 thru-hull fitting fit?\u003c\/strong\u003e The attwood 3873-3 is sized for 3\/4 inch inside diameter hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum hull thickness this fitting can be used with?\u003c\/strong\u003e The 3873-3 accommodates hulls up to 1-1\/4 inches thick.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the stem on this thru-hull fitting?\u003c\/strong\u003e Stem length is 3-1\/4 inches, which is the portion that passes through the hull.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the flange diameter of the attwood 3873-3?\u003c\/strong\u003e The flange measures 2-1\/4 inches in diameter, providing the seating surface against the hull.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the attwood 3873-3 thru-hull fitting made from?\u003c\/strong\u003e It is made from polypropylene, a corrosion-resistant, lightweight plastic suited to marine plumbing use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is this thru-hull fitting?\u003c\/strong\u003e The 3873-3 is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the attwood 3873-3 weigh?\u003c\/strong\u003e It weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a thru-hull fitting used for?\u003c\/strong\u003e A thru-hull fitting like the 3873-3 provides a sealed passage point through the boat's hull for plumbing lines such as bilge pump discharge, livewell drains, or washdown hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the attwood 3873-3 require sealant during installation?\u003c\/strong\u003e Yes, standard thru-hull installation calls for marine sealant between the flange and hull surface to prevent water intrusion; the fitting itself does not include sealant.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the attwood 3873-3 corrode over time in saltwater use?\u003c\/strong\u003e No, because it is made of polypropylene rather than metal, the 3873-3 will not corrode in fresh or saltwater environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the hose clamped directly onto the attwood 3873-3?\u003c\/strong\u003e Yes, the stem is barbed so 3\/4 inch inside diameter hose can be pushed on and secured with a hose clamp.\u003c\/p\u003e","brand":"Attwood","offers":[{"title":"Default Title","offer_id":48989669130459,"sku":"ATT-3873-3","price":4.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/71rAHCSFXzL.jpg?v=1784486758","url":"https:\/\/www.goodvibesmarina.com\/products\/attwood-3873-3-thru-hull-fitting-white-fits-3-4-id-hose","provider":"Good Vibes Marina","version":"1.0","type":"link"}