Brass float valves are used as inlet valves and are controlled by the level in the storage tank. If the level drops, the float valve opens automatically. If the level rises, the water flow is shut off by the ball float. part 1 Valve has the water outlet spout on the underside of the float valve and a part 2 has it on top of the body with a plastic nozzle which directs the water downwards into the tank.