This guide shows you how to set up and operate a set of diverter valves for a basic pool and spa system. This pool system includes a main drain, one skimmer, a suction line and a set of pool return ports. The spa system includes a spa drain and return jets. Water will flow from the pool and spa to the pump, through a filter and back out to the pool and spa.
We should point out that this setup is not the only way you could configure your diverter valves bot it is a working solution and it does show you some of the options considered in setting up the diverter valves.