For moderate fuel requirements of engines up to about 180 horsepower, a single Solid State fuel pump like this one is usually sufficient. Facet fuel pumps have low power requirements (about 1 amp at 12 volts) and operate without troublesome seals or diaphragms. Built-in pressure relief means no flooding after shutting down a hot engine. Facet pumps are compatible with gasoline, alcohol blends (up to and including E85), diesel, biodiesel, and fuel additives. Maximum fuel delivery 34 gallons per hour. Maximum pressure 7 to 10 psi. In a typical application the pump will deliver about 18 gallons per hour at 7 psi. 1/8 NPT female ports. Maximum vertical lift rating is 24 inches. This pump does not have a one-way valve or an anti-siphon valve. Fuel can still flow through the pump when it is turned off.