{"product_id":"attwood-3873-1-thru-hull-connector-3-4-in-hose-white","title":"Attwood 3873-1 Thru-Hull Connector 3\/4 in Hose White","description":"\u003cp class=\"nvn-hero\"\u003eThe Attwood 3873-1 thru-hull connector is white polypropylene plumbing hardware for a 3\/4 inch hose run through the hull or transom. It won't corrode or seize like brass, the 1-3\/4 inch flange seats flush, and the stem passes through material up to 1-1\/4 inch thick. A clean, no-drama fitting for livewell, bilge, and washdown lines.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Attwood 3873-1 thru-hull connector is one of those simple parts that quietly keeps a boat working. It's a white polypropylene fitting that gives a 3\/4 inch hose a clean, sealed path out through the hull or transom. No moving parts, nothing to corrode, nothing to overthink. You pass it through a drilled hole, bed the flange in sealant, clamp your hose to the barb, and you're done.\u003c\/p\u003e\n\u003cp\u003eWhat makes it worth having in the parts bin is the material. It's molded polypropylene, not brass or chrome-plated metal. On a boat that matters more than it sounds. Metal thru-hull fittings look great on day one, but after a couple of seasons in salt water they pit, they corrode, and the threaded ones tend to seize so hard you end up cutting them out. Polypropylene doesn't do any of that. It shrugs off salt, UV, and the kind of chemistry that lives in a bilge or a livewell. The white color blends in with most gelcoat and painted hulls instead of standing out like a sore thumb.\u003c\/p\u003e\n\u003cp\u003eWe reach for a fitting like this on all the usual jobs. Livewell and baitwell drains. Bilge pump discharge lines. Aerator overflow. Deck and cockpit drains. Washdown pump returns. Anywhere a 3\/4 inch hose needs to get from the inside of the boat to the outside without leaking, this is the part that does it. If you're plumbing a new livewell or chasing down a tired old fitting that finally cracked, dropping one of these in is an afternoon job at most. Keep the barb pointed where you want the water to go and you're halfway there.\u003c\/p\u003e\n\u003cp\u003eThe dimensions are straightforward. The barbed stem fits 3\/4 inch hose and runs 3-1\/4 inches long, which gives you enough length to pass through hull or transom material up to 1-1\/4 inch thick. The flange is 1-3\/4 inches in diameter, so it seats flat and gives you a solid face to bed in sealant. That's a common size for drain and discharge work, and it covers the vast majority of small-boat plumbing you'll run into. Measure your hull thickness at the mounting spot before you drill, and make sure the stem has room to clear on the inside.\u003c\/p\u003e\n\u003cp\u003eA couple of install notes from experience. First, bed the flange in a good marine-grade sealant and snug your hose with a stainless clamp. Those two steps are what separate a dry bilge from a slow mystery leak. Second, think about where this fitting lives relative to the waterline. A straight polypropylene connector like this is meant for above-waterline work, think livewell overflow, bilge discharge, washdown returns, the stuff that sits up out of the water when the boat's at rest. If you need a pass-through below the waterline, that's seacock territory and you'll want a proper seacock-rated setup instead. When you're not sure, mount it high.\u003c\/p\u003e\n\u003cp\u003eOne more thing worth mentioning. A 3\/4 inch line is the common size for a lot of small bilge pumps, livewell aerator kits, and washdown setups, so this connector drops right into gear you probably already own. Match the hose to the pump outlet, run it to this fitting, and you've got a tidy discharge path. Simple, reliable, and the kind of part that just works.\u003c\/p\u003e\n\u003cp\u003eIt ships as a single connector in bulk packaging, so you're paying for the part and not a fancy blister pack. That's how most rigging shops want to buy this stuff anyway. Keep a couple on the shelf. Thru-hull fittings are one of those parts you never think about until one cracks, and when that happens you want the replacement in hand, not three days out. For the money, the Attwood 3873-1 is an easy call.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eFits 3\/4 inch hose on a barbed stem that grips tight under a standard stainless hose clamp\u003c\/li\u003e\n  \u003cli\u003eWhite polypropylene body resists saltwater corrosion, UV, and most bilge chemicals, so it won't seize or pit like brass\u003c\/li\u003e\n  \u003cli\u003e3-1\/4 inch stem length passes through hulls and transoms up to 1-1\/4 inch thick\u003c\/li\u003e\n  \u003cli\u003e1-3\/4 inch diameter flange seats flush against the hull for a clean, sealable face\u003c\/li\u003e\n  \u003cli\u003eLightweight molded build keeps hardware weight down on drain and discharge lines\u003c\/li\u003e\n  \u003cli\u003eHandles livewell and baitwell drains, bilge pump discharge, aerator overflow, and deck or washdown lines\u003c\/li\u003e\n  \u003cli\u003eSold as a single connector in bulk packaging, so you buy only what the job needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Attwood Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size hose does this connector fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's built for 3\/4 inch hose. The barbed stem grips the hose, and we'd always back it up with a stainless hose clamp so the line can't creep off under pressure.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the connector made of?\u003c\/summary\u003e\n    \u003cp\u003eWhite polypropylene. That matters on a boat because it won't corrode, pit, or seize up the way a brass or chrome fitting eventually does in salt water. It also shrugs off most bilge and livewell chemicals.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow thick a hull can it go through?\u003c\/summary\u003e\n    \u003cp\u003eThe stem handles hull or transom thickness up to 1-1\/4 inch. On most fiberglass transoms and drain locations you've got plenty of room to work with.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the flange diameter?\u003c\/summary\u003e\n    \u003cp\u003eThe flange is 1-3\/4 inch across. It seats flat against the hull and gives you a solid surface to bed in sealant.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use this below the waterline?\u003c\/summary\u003e\n    \u003cp\u003eWe'd keep a straight polypropylene connector like this to above-waterline jobs, like livewell overflow, bilge discharge, and washdown returns. Anything that sits below the waterline really wants a proper seacock and a seacock-rated thru-hull. When in doubt, mount it high.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's it typically used for?\u003c\/summary\u003e\n    \u003cp\u003eLivewell and baitwell drains, bilge pump discharge, aerator overflow, and deck or cockpit drain lines. Basically any spot where a 3\/4 inch hose needs to pass cleanly through the hull.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with sealant or a hose clamp?\u003c\/summary\u003e\n    \u003cp\u003eIt's sold as a single connector in bulk packaging. Plan on a tube of marine-grade sealant to bed the flange and a stainless hose clamp for the barb. Both are cheap insurance against a leak.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it hold up in salt water long term?\u003c\/summary\u003e\n    \u003cp\u003eThat's exactly what polypropylene is good at. No rust, no galvanic corrosion with nearby metal, and no seizing. Rinse your boat down like you already do and this fitting will outlast a lot of the gear around it.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eThru-Hull Connector; Fits 3\/4 Inch Hose; Polypropylene; White; 3-1\/4 Inch Length Stem; 1-3\/4 Inch Diameter Flange; 1-1\/4 Inch Hull Thickness; Single; Bulk Packaging\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAttwood Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e3873-1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e022697025227\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHose Size\u003c\/th\u003e\n\u003ctd\u003e3\/4 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStem Length\u003c\/th\u003e\n\u003ctd\u003e3-1\/4 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFlange Diameter\u003c\/th\u003e\n\u003ctd\u003e1-3\/4 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Hull Thickness\u003c\/th\u003e\n\u003ctd\u003e1-1\/4 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePackaging\u003c\/th\u003e\n\u003ctd\u003eBulk\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size hose does this connector fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's built for 3\/4 inch hose. The barbed stem grips the hose, and we'd always back it up with a stainless hose clamp so the line can't creep off under pressure.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the connector made of?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"White polypropylene. That matters on a boat because it won't corrode, pit, or seize up the way a brass or chrome fitting eventually does in salt water. It also shrugs off most bilge and livewell chemicals.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How thick a hull can it go through?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The stem handles hull or transom thickness up to 1-1\/4 inch. On most fiberglass transoms and drain locations you've got plenty of room to work with.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the flange diameter?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The flange is 1-3\/4 inch across. It seats flat against the hull and gives you a solid surface to bed in sealant.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use this below the waterline?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"We'd keep a straight polypropylene connector like this to above-waterline jobs, like livewell overflow, bilge discharge, and washdown returns. Anything that sits below the waterline really wants a proper seacock and a seacock-rated thru-hull. When in doubt, mount it high.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's it typically used for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Livewell and baitwell drains, bilge pump discharge, aerator overflow, and deck or cockpit drain lines. Basically any spot where a 3\/4 inch hose needs to pass cleanly through the hull.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with sealant or a hose clamp?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's sold as a single connector in bulk packaging. Plan on a tube of marine-grade sealant to bed the flange and a stainless hose clamp for the barb. Both are cheap insurance against a leak.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it hold up in salt water long term?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"That's exactly what polypropylene is good at. No rust, no galvanic corrosion with nearby metal, and no seizing. Rinse your boat down like you already do and this fitting will outlast a lot of the gear around it.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Attwood Marine","offers":[{"title":"Default Title","offer_id":67599046836317,"sku":"2011121","price":8.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_0110b380-f642-4db3-a245-b24952895cc4.jpg?v=1790957675","url":"https:\/\/nvnmarine.com\/products\/attwood-3873-1-thru-hull-connector-3-4-in-hose-white","provider":"NVN Marine","version":"1.0","type":"link"}