Forespar MF 841 Vent Cap AssemblyMF 841 Vent Cap AssemblyInstalling 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 eff..

Forespar MF 839 Vented Loop - 1-1/4" [903011]MF 839 Vented Loop - 1-1/4"Installing 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 ..