Brand: Fuel Safe Fuel Cells
This rollover check valve has male 8AN fittings for easy installation in a -8 vent hose. It is designed to allow air to flow freely into your fuel cell, but to stop fuel spilling out in the event of a rollover.
This valve must be installed right-side-up. It is not spring-loaded and depends on gravity to close the valve when it is upside-down. 4 1/2" long overall including fittings.