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 anti-siphon feature complies with basic back-siphoning regulations. The popular rugged plastic housing is molded from high-grade polystyrene for added strength and durability. Comes with expansion brackets to fit tanks rims up to 2 inch thick and 4.325 inch wide. Accepts a standard 3/4 inch garden hose. Measures 7.5 inch long by 3 inch wide by 4.2 inch high. Also available in aluminum housing (Item No. TM830AS, sold separately). Anti-Siphon Float Valve automatically controls water level for most plastic and metal stock tanks, troughs, barrels, and pans Flows up to 245 gallons per hour, operates between 20 and 50 psi High-grade polystyrene housing with expansion brackets to fit tanks with wider or thicker rims Accepts a standard 3/4 inch garden hose