The Megaflow Trough Valve is float operated for use in automatic filling of water troughs. Designed for under water mounting only. The float is connected to the valve with a nylon cord. The Megaflow valve is diaphragm operated. Actuated by a pilot pin to create a 1-2 second positive on/off, over ¾"-2½" differential (varies with pressure) for a near hammerless operation. Megaflow valves are a good choice where their high flow, compact, robust, non-corrosive construction and high level of adaptability are needed.