VARIATIONS OF DIVERTER VALVES - Some of the manufactures of Diverter Valves include CMP, Jandy, Waterway,and Pentair. Most of the diverter Valve are now maintenance free. With many of the older models, you had to lubricate them every year. Diverter Valves are sold with and without unions. A Valve with unions can be serviced or replaced without having to cut the Valve out of the piping.