Not available in Quebec. Effectively control the water level in your stock tanks with the Little Giant Trough-O-Matic(R) tank float valve. This versatile tank float valve is designed for use in most plastic and metal stock tanks, troughs, barrels, and pans and can flow up to 245 gallons per hour. Constructed from high-grade polystyrene, the moulded housing is both strong and durable. Expansion brackets are included for a secure fit on wider or thicker rims.