With aluminum 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. Also available in plastic housing (Item No. TM825, sold separately).