{"product_id":"attwood-3876-3-thru-transom-scupper-valve-kit-for-1-1-2-hose-self-bailing-cockpit-drain-above-waterline","title":"Attwood 3876-3 Thru-Transom Scupper Valve with Flapper, Acetal, for 1-1\/2 Inch I.D. Hose","description":"\u003cp\u003eThe Attwood 3876-3 is a thru-transom scupper valve built for self-bailing cockpits. Its rubber flapper opens under water pressure to let cockpit water drain overboard, then closes to stop water from washing back in through the same opening. The valve body is molded from Acetal, a rigid, corrosion-resistant plastic that holds up well against saltwater and UV exposure, and it is sized to connect to 1-1\/2 inch I.D. Hose. It is designed to be mounted over an existing thru-hull fitting of up to 2 inches, and the assembly itself has an overall diameter of 2-7\/8 inches.\u003c\/p\u003e\u003cp\u003eThe kit includes everything needed for the install: a corrosion-resistant retainer ring, mounting screws, the rubber flapper valve, and a gasket, for four pieces total in the box. This is a simple, one-way check valve setup, meaning it only allows water to flow in one direction, out of the boat, protecting the cockpit from backwash while underway or at rest. Installation is intended for above the waterline only; as with other plastic thru-hull connectors, it is not designed for below-waterline use. This makes it well suited for boats with self-bailing cockpit decks that need a reliable, low-maintenance drain valve that will not corrode like metal alternatives.\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 3876-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thru-Transom Scupper Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Acetal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e Check valve (flapper style)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Connection:\u003c\/strong\u003e For 1-1\/2 inch I.D. Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThru-Hull Mounting Fitting Size:\u003c\/strong\u003e Up to 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Diameter:\u003c\/strong\u003e 2-7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 4.5 x 9.25 x 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Above the waterline only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Retainer ring, mounting screws, rubber flapper valve, gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 022697387639\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Attwood 3876-3 scupper valve do?\u003c\/strong\u003e It drains water out of a self-bailing cockpit through a rubber flapper that opens under water pressure to let water flow out, then closes to prevent water from washing back in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hose size does the 3876-3 fit?\u003c\/strong\u003e The Attwood 3876-3 is sized for 1-1\/2 inch I.D. Hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this valve be installed below the waterline?\u003c\/strong\u003e No. Like other plastic thru-hull connectors, the 3876-3 is designed for installation above the waterline only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the scupper valve made of?\u003c\/strong\u003e The 3876-3 body and flapper assembly are made of Acetal, a rigid plastic that resists corrosion in marine environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box with the 3876-3?\u003c\/strong\u003e The kit ships with a retainer ring, mounting screws, the rubber flapper valve, and a gasket, four pieces in total.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size thru-hull fitting does the 3876-3 mount over?\u003c\/strong\u003e It is designed to be mounted over an existing thru-hull fitting of up to 2 inches in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the Attwood 3876-3 overall?\u003c\/strong\u003e The assembly has an overall diameter of 2-7\/8 inches, with item dimensions of 4.5 x 9.25 x 3.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 3876-3 a one-way valve?\u003c\/strong\u003e Yes, it functions as a check valve: the rubber flapper opens to let water drain out and closes to block backwash, allowing flow in one direction only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Attwood 3876-3 weigh?\u003c\/strong\u003e The scupper valve weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Attwood 3876-3 a genuine Attwood part?\u003c\/strong\u003e Yes, the 3876-3 is a genuine Attwood scupper valve, part of Attwood's thru-transom valve lineup for self-bailing cockpits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat boats is the 3876-3 scupper valve suitable for?\u003c\/strong\u003e It is intended for boats with self-bailing cockpit decks that need a thru-transom drain valve mounted above the waterline.\u003c\/p\u003e","brand":"Attwood","offers":[{"title":"Default Title","offer_id":48989669261531,"sku":"ATT-3876-3","price":11.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/att-3876-3_large__57113.1558177599.500.750.jpg?v=1785188410","url":"https:\/\/www.goodvibesmarina.com\/products\/attwood-3876-3-thru-transom-scupper-valve-kit-for-1-1-2-hose-self-bailing-cockpit-drain-above-waterline","provider":"Good Vibes Marina","version":"1.0","type":"link"}