The Jobe Valves Vortex Valve is a float-operated valve for use in automatic filling of water tanks, troughs, cisterns, etc. The vortex valve is configured for above water mounting. The float operates a small pilot valve which in turn operates the main diaphragm valve. Vortex float valves are a good choice where maximum flow, compact, robust, non-corrosive construction and variable float levels are required. It also features robust, durable construction for spectacular longevity.