| abstract |
A sump apparatus including a first pump adapted to be operated by a principal power source and a second pump adapted to be operated by an auxiliary power source, particularly a storage battery. A control system is provided which normally provides power for the first pump and is operative to charge a storage battery for the second pump when necessary. The control system is also operative to automatically condition the second pump for energization whenever the principal power source fails, totally or partially, or to energize the second pump from the auxiliary power source if the first pump is unable to maintain pumping requirements sufficient to empty a sump well or the like. The control system also includes a warning system for indicating when both pumps are running simultaneously or when the principal power source has failed. |