Automate your stocks water supply with Trough-O-Matic- Plastic with Expansion Brackets Product details 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 Expansion brackets to fit tanks with wider or thicker rims Accepts a standard ? Dimensions: 3 L x 7-1/2 W x 3-1/2 H Float Valve automatically controls water level for most plastic and metal stock tanks troughs barrels and pans. Flows up to 245gal 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 3/4in garden hose.