Adopting automotive technology, marine industry engineers developed several effective solutions. A typical system includes a Fluid Limit Vent Valve (FLVV) installed on the tank, and a flapper style check valve install on the fuel inlet hose just above the tank. As fuel rushes into the tank during filling, the air that is displaced runs out through the FLVV. When the fuel reaches the maximum fill level, the FLVV closes, shutting off airflow. At this point, the fuel backs up the fill hose and trips the aspirator on the nozzle to shutoff. The check valve prevents fuel in the tank from backing up the fill hose, onto the vessel, or into the waterway.

Moeller reviews your specific requirements to develop a fully integrated fuel system for each project. We work with every major diurnal component manufacturer to deliver a range of EPA-compliant and NMMA-certified options for your unique build requirement. In 2015, Moeller introduced a fully compliant, low cost vent valve; click here for more information. To learn more about the anti-spitback requirement–and how we can help you develop a fully compliant solution—contact your Regional Sales Manager or click here.