Forespar MF 840 Vented Loop - 1-1/2" [903000] Marine Plumbing & Ventilation | Blowers & Heaters When called upon to provide

When called upon to provide life-saving floatation

where its small size can deliver maximum range

totally emulsifying them so there’s no need to add “tissue digesters” or other “boosters” to your system

Easily assembles and disassembles for convenient storage

Forespar MF 840 Vented Loop - 1-1/2" [903000] Marine Plumbing & Ventilation | Blowers & Heaters When called upon to provideMF 840 Vented Loop 1 1 2" 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 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