The sump pump liner houses 2 sump pumps and an Ultra Sump, a Water Watch alarm is installed on top of the liner, a back up battery sits just behind the pump. Many storms that have caused flooding have also been responsible for knocking out the power. The SaniDry Sedona is a small and mighty dehumidifier that will pull moisture from the air and control the relative humidity of the home. Controlling humidity levels helps with mold and dust mites.