Whitecap Fuel Demand Valves are designed to prevent pressurized fuel from
escaping the tank and reaching the engine. Our valves will only send fuel when
either demanded by the engine at start up or by standard engine operation.
When installed correctly on a marine fuel tank, Whitecap’s line of fuel demand
valves will provide all of the required dynamic features to meet or exceed.
United States Coast Guard (USCG) Regulations in addition to the 
American Boat and Yacht Council (ABYC) building Standards.

Proposition 65 Warnings Website - Your right to know (ca.gov)