Miller MFG Little Giant Trough-O-Matic Automatic Float Valve - Metal Housing No reviews. Login to place a review. •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 •Durable aluminum housing •Accepts a standard 3/4 inch garden hose $23.99 ea Call for availability $23.99 Log in to see your Member Loyalty Rewards PRODUCT DETAILS Miller MFG Little Giant Trough-O-Matic Automatic Float Valve - Metal Housing 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-metal valve flows up to 245 gallons per hour and operates at pressure between 20 and 50 psi. Durable aluminum housing with nylon orifice. Accepts a standard 3/4 inch garden hose. Measures 7.5 inch long by 3 inch wide by 3.5 inch high.