1″ Hudson Water Fill Valve

1″ Hudson Water Fill Valve The Aquascape Hudson Float Valve maintains fluid levels without the use of a ball float. The Hudson Valve is compact and virtually indestructible. The internal parts are made of ABS plastic, EPDM rubber & stainless steel. Hudson Float Valves use fluid pressure, as opposed to a lever arm and ball to force a float to rise and close a diaphragm chamber. When the fluid level drops, the diaphragm escape is opened and the fluid is allowed to fill the tank. Water