This is our SmartSump- is a combination of patented and custom components that make up a highly efficient and reliable water evacuation system for Crawl Space Environments. SmartSumps are designed to evacuate water from the CleanSpace Crawl Space Encapsulation System. Since you don't go into your crawl space a lot you need to know if there is a plumbing leak. The SmartSump has a unique lid design so water from a plumbing leak fills an alarm pocket on the lid first, sounding a WaterWatch alarm. From there, the water flows down a special airtight floor drain that lets water down, but damp air cannot come up into your crawl space. The alarm also alerts you to pump or any power Failures. It does have an optional battery backup protection in case the power does go out. The optional UltraSump battery backup pumping system has a second pump in case of primary pump failure, the second switch in case of switch failure, and a second power source in case of power failure. The UltraSump can pump out over 12,000 gallons of water out with the energy in the special 120 AMP sealed powerpack. A charger keeps it charged when the power is on, and an alarm will tell you when the Ultra Sump is operating. The UltraSump is optional but highly recommended!