Little Giant Trough-O-Matic® Float Valves automatically control the
water level for most plastic and metal stock tanks, troughs,
barrels, and pans. The all-plastic valve flows up to 245 gallons per
hour and operates at pressure between 20 and 50 psi. The
popular rugged plastic housing is molded from high-grade polystyrene for
added strength and durability. Accepts a standard 3/4 inch
garden hose. Plastic.