{"product_id":"midland-industries-46529-marine-anti-siphon-valve-1-4-brass","title":"Midland Industries 46529 Marine Anti-siphon Valve 1\/4 Brass","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MIDLAND INDUSTRIES 46529 is a brass marine anti-siphon valve designed to prevent backflow and siphoning in marine fuel and fluid systems. It connects inline between a hose barb fitting and a male pipe thread (MPT) port, creating a one-way flow path that stops fluid from reversing direction when pressure differentials occur. The valve body is brass construction for corrosion resistance in wet and marine environments. Nominal size is 1\/4 x 1\/4 inch with a 1\/4-18 NPT thread size on the male pipe thread end. Installation requires no special tools beyond standard wrenches and thread sealant. This valve is suited for plumbing and marine technicians working on fuel feed lines, bilge systems, or similar low-pressure fluid circuits.\u003c\/p\u003e\n\u003cp\u003eThis anti-siphon valve is used in marine plumbing applications where backflow prevention is required at the point of connection between a flexible hose and a threaded fitting. Typical installations include fuel tank vent lines, engine fuel supply circuits, and fluid reservoir outlets on recreational and commercial watercraft. The hose barb end accepts standard flexible tubing, while the MPT end threads directly into a tank fitting, manifold, or inline port. It is compact enough to fit in tight engine compartments and instrument panels where space is limited.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass body construction for corrosion resistance in marine and wet environments\u003c\/li\u003e\n  \u003cli\u003e1\/4 x 1\/4 inch nominal size with 1\/4-18 NPT male pipe thread\u003c\/li\u003e\n  \u003cli\u003eHose barb x MPT connection type for direct inline installation between flexible tubing and threaded ports\u003c\/li\u003e\n  \u003cli\u003eAnti-siphon design prevents backflow and reverse fluid migration\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions  -  2 inches in length, 0.6 inches wide, 0.55 inches in height\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.065 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for marine anti-siphon valve applications requiring a 1\/4-inch hose barb x MPT brass valve in fuel, vent, or fluid lines.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified marine technician or licensed plumber familiar with marine fuel system codes and ABYC standards. Shut off all fuel supply and relieve system pressure before removing or installing any inline valve. Apply an appropriate thread sealant or PTFE tape to the MPT threads before assembly, and do not overtighten the brass fitting to avoid thread damage. Verify flow direction arrow or valve orientation before final connection to ensure correct anti-siphon operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 1\/4 x 1\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-18 NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Hose Barb x MPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.55 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.065 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MIDLAND INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 46529\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MIDLAND INDUSTRIES","offers":[{"title":"Default Title","offer_id":67951387279666,"sku":"46529","price":21.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/57162d785e625827a28895004a60d9fe_9cd93b36-9cc4-46d7-8a41-9e93c421e0ce.jpg?v=1791726415","url":"https:\/\/voomisupply.com\/products\/midland-industries-46529-marine-anti-siphon-valve-1-4-brass","provider":"Voomi Supply","version":"1.0","type":"link"}