{"title":"Marine Vented Loops","description":"\u003cp\u003eExplore Marine Vented Loops at Mariners Warehouse. Compare available products and review each listing for part numbers and specifications.\u003c\/p\u003e","products":[{"product_id":"forespar-mf-840-vented-loop-1-1-2-73258","title":"Forespar MF 840 Vented Loop - 1-1\/2\" MPN - 903000","description":"\u003cp\u003e\u003cstrong\u003eMF 840 Vented Loop - 1-1\/2\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 1-1\/2\" (38.1mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 5-1\/4\" (133.35mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 7-3\/4\" (196.85mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435129506,"sku":"73258","price":37.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73258XL.jpg?v=1765323847"},{"product_id":"forespar-mf-842-vented-loop-3-4-73259","title":"Forespar MF 842 Vented Loop - 3\/4\" MPN - 903001","description":"\u003cp\u003e\u003cstrong\u003eMF 842 Vented Loop - 3\/4\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 3\/4\" (19.05mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 4-1\/2\" (114.3mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 3-3\/4\"\" (95.25mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435096738,"sku":"73259","price":33.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73259XL.jpg?v=1765323847"},{"product_id":"forespar-mf-843-vented-loop-5-8-73261","title":"Forespar MF 843 Vented Loop - 5\/8\" MPN - 903003","description":"\u003cp\u003e\u003cstrong\u003eMF 843 Vented Loop - 5\/8\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 5\/8\" (15.87mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 4-1\/2\" (114.3mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 4\" (101.6mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435260578,"sku":"73261","price":45.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73261XL.jpg?v=1765323849"},{"product_id":"forespar-mf-845-vented-loop-1-2-73265","title":"Forespar MF 845 Vented Loop - 1\/2\" MPN - 903008","description":"\u003cp\u003e\u003cstrong\u003eMF 845 Vented Loop - 1\/2\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 1\/2\" (12.7mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 5-1\/4\" (133.35mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 4-1\/4\" (107.95mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435489954,"sku":"73265","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73265XL.jpg?v=1765323855"},{"product_id":"forespar-mf-839-vented-loop-1-1-4-73267","title":"Forespar MF 839 Vented Loop - 1-1\/4\" MPN - 903011","description":"\u003cp\u003e\u003cstrong\u003eMF 839 Vented Loop - 1-1\/4\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 1-1\/4\" (28.57mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 7\" (177.8mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 9\" (228.6mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435522722,"sku":"73267","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73267XL.jpg?v=1765323854"},{"product_id":"forespar-mf-847-vented-loop-1-1-8-73268","title":"Forespar MF 847 Vented Loop - 1-1\/8\" MPN - 903018","description":"\u003cp\u003e\u003cstrong\u003eMF 847 Vented Loop - 1-1\/8\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 1-1\/8\" (28.57mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 7\" (177.8mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 9\" (228.6mm)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":46386435621026,"sku":"73268","price":55.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/73268XL.jpg?v=1765323857"},{"product_id":"groco-bronze-vented-loop-1-2-hose-75230","title":"GROCO Bronze Vented Loop - 1\/2\" Hose MPN - HVL-500","description":"\u003cp\u003e\u003cstrong\u003eBronze Vented Loop - 1\/2\" Hose \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAllows air to enter to break siphon, but does not permit air and odors to escape! Cap is threaded 1\/2\" NPT to accept a barb fitting if you wish to vent overboard.\u003c\/li\u003e\n\u003cli\u003eOverboard venting is required if PVL or HVL series is used in an exhaust system.\u003c\/li\u003e\n\u003cli\u003eHVL and PVL series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools.\u003c\/li\u003e\n\u003cli\u003eMount Hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":46386494996642,"sku":"75230","price":304.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/75230XL.jpg?v=1765324821"},{"product_id":"groco-bronze-vented-loop-3-4-hose-75231","title":"GROCO Bronze Vented Loop - 3\/4\" Hose MPN - HVL-750","description":"\u003cp\u003e\u003cstrong\u003eBronze Vented Loop - 3\/4\" Hose \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAllows air to enter to break siphon, but does not permit air and odors to escape! Cap is threaded 1\/2\" NPT to accept a barb fitting if you wish to vent overboard.\u003c\/li\u003e\n\u003cli\u003eOverboard venting is required if PVL or HVL series is used in an exhaust system.\u003c\/li\u003e\n\u003cli\u003eHVL and PVL series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools.\u003c\/li\u003e\n\u003cli\u003eMount Hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":46386495029410,"sku":"75231","price":288.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/75231XL.jpg?v=1765324822"},{"product_id":"groco-bronze-vented-loop-1-hose-75232","title":"GROCO Bronze Vented Loop - 1\" Hose MPN - HVL-1000","description":"\u003cp\u003e\u003cstrong\u003eBronze Vented Loop - 1\" Hose \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAllows air to enter to break siphon, but does not permit air and odors to escape! Cap is threaded 1\/2\" NPT to accept a barb fitting if you wish to vent overboard.\u003c\/li\u003e\n\u003cli\u003eOverboard venting is required if PVL or HVL series is used in an exhaust system.\u003c\/li\u003e\n\u003cli\u003eHVL and PVL series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools.\u003c\/li\u003e\n\u003cli\u003eMount Hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":46386495127714,"sku":"75232","price":287.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/75232XL.jpg?v=1765324824"},{"product_id":"groco-bronze-vented-loop-1-1-2-hose-75233","title":"GROCO Bronze Vented Loop - 1-1\/2\" Hose MPN - HVL-1500","description":"\u003cp\u003e\u003cstrong\u003eBronze Vented Loop - 1-1\/2\" Hose \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAllows air to enter to break siphon, but does not permit air and odors to escape! Cap is threaded 1\/2\" NPT to accept a barb fitting if you wish to vent overboard.\u003c\/li\u003e\n\u003cli\u003eOverboard venting is required if PVL or HVL series is used in an exhaust system.\u003c\/li\u003e\n\u003cli\u003eHVL and PVL series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools.\u003c\/li\u003e\n\u003cli\u003eMount Hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":46386495160482,"sku":"75233","price":330.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/75233XL.jpg?v=1765324825"},{"product_id":"groco-bronze-vented-loop-2-hose-75234","title":"GROCO Bronze Vented Loop - 2\" Hose MPN - HVL-2000","description":"\u003cp\u003e\u003cstrong\u003eBronze Vented Loop - 2\" Hose \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAllows air to enter to break siphon, but does not permit air and odors to escape! Cap is threaded 1\/2\" NPT to accept a barb fitting if you wish to vent overboard.\u003c\/li\u003e\n\u003cli\u003eOverboard venting is required if PVL or HVL series is used in an exhaust system.\u003c\/li\u003e\n\u003cli\u003eHVL and PVL series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools.\u003c\/li\u003e\n\u003cli\u003eMount Hardware is included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GROCO","offers":[{"title":"Default Title","offer_id":46386495258786,"sku":"75234","price":405.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/75234XL.jpg?v=1765324827"},{"product_id":"vented-loop-brz-0-75","title":"Buck Algonquin Vented Loop Brz 0.75\" MPN - 00VL75","description":"\u003cp\u003eBuck Algonquin Vented Loop Brz 0.75\" is listed in the Mariners Warehouse catalog. Use the verified product identifiers below to compare this item with your application before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Buck Algonquin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e General\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 00VL75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 260909\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePlease confirm fitment, dimensions, and other application requirements before ordering when those details are important to your installation.\u003c\/p\u003e","brand":"Buck Algonquin","offers":[{"title":"Default Title","offer_id":47336322728098,"sku":"260909","price":64.89,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/fs_260909_Web2.jpg?v=1784628316"},{"product_id":"forespar-mf-844-vented-loop-1-107915","title":"Forespar MF 844 Vented Loop - 1\" MPN - 903016","description":"\u003cp\u003e\u003cstrong\u003eMF 844 Vented Loop - 1\"\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstalling one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in marine toilet and engine cooling systems. The simple valve system incorporated in the top of the loop allows air to enter the line when not used, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither the vent nor the loop will corrode. The duckbill one-way valve is designed to seal properly if particulate matter is present in fluids. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBarb Size: 1\" (25.4mm)\u003c\/li\u003e\n\u003cli\u003eHeight: 7\" (177.8mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 9\" (228.6mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 903016\u003c\/p\u003e","brand":"Forespar Performance Products","offers":[{"title":"Default Title","offer_id":47479374905506,"sku":"107915","price":35.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/107915XL.jpg?v=1785229956"}],"url":"https:\/\/marinerswarehouse.com\/collections\/marine-vented-loops.oembed","provider":"Mariners Warehouse Shop","version":"1.0","type":"link"}