Waterway Skimmer is a door used to close the skimmer when it is turned off to prevent debris and dirt from entering the skimmer. It adjusts the water level of the pool by itself. Traps the leaves drawn into the skimmer when the pump is running and holds the leaves in the skimmer when the pump shut down. Pool Vac offers a complete line of white skimmer doors for Waterway Renegade GuniteSkimmers.