This automatic cattle waterer has float controlled refill feature that automatically refills the tank based on its water level! Anti-SiphonFloat Valve automatically controls water level for most plastic and metal stock tanks troughs barrels and pans Flow up to245 gallons per hour and operates between 20 and 50 PSI Durable aluminum housing with expansion brackets to fit tanks with wider or thicker rims Accepts standard ¾” garden hose Engineered to help keep America s workers safe and working Designed and tested with the utmost safety in mind Exceptional quality at a budget-friendly price Trough-O-Matic3/4 (F) NPT x 3/4 (F) NPT Stock Tank Float Valve with AluminumHousing and Anti-Siphon Float Valve by Little Giant Farm®. Little GiantTrough-O-Matic Float Valves automatically control the water level for most plastic and metal stock tanks troughs barrels and pans. The all-metal valve flows up to 245 gallons per hour and operates at a pressure between 20 and 50psi. The anti-siphon feature complies with basic back-siphoning regulations. Durable aluminum housing with a nylon orifice. Comes with expansion brackets to fit tank rims up to 2” thick and 4” inch wide. Accepts a standard ¾” gardenhose. Measures 7.5” long by 3 inches wide by 4.2” high.