Installing a vented loop will ensure that fluids will not siphon from a tank or the sea. 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. Moulded 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.
Spare Vent Cap and Duck Bill Assembly Part No. 13-80752-3
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