VENTED LOOP MF842 MARELON 3/4"

Forespar Marelon Vented Loops are designed to keep fluids from siphoning from tank to tank. They are frequently used in black water and engine cooling systems. The loop utilizes a simple valve to allow air into the line when it is not in use, but seals when water or other fluid is passing through. These loops are corrosion resistant and can be used with the FSP903004 Vent Barb Assembly, that can be used in lieu of the standard cap/duckbill to allow venting to the outside of the hull via a 1/4" hose. It should only be utilized if it will be installed at least 10" above the vessel waterline.