RETURN SETUP - For this pool system configuration, the return water flow after the pump and through the filter does not require a diverter valve. The only return option is to the 3 to 4 return ports in the sides of the pool. These are generally all open when the pump is operating. So, as this picture shows, the plumbing for the return side is a pipe coming from the filter and branching out to the return pipes. Note if your system has a chlorinator, the connection will be a pipe from the chlorinator to the return pipes.