If your home or building is to be unoccupied for longer than a couple of weeks, perform the following procedure:
Purge the System – Run clean water into the unit until the pump activates. Immediately turn off the water and allow the grinder pump to run until it shuts off automatically.
Duplex Units – Special attention must be taken to ensure that both pumps turn on when clean water is added to the tank.
Caution – Do not disconnect power to the unit.