The main influent pump is a VFD driven Crane Demming 60 HP 2800

GPM centrifugal pump. The 3 lag pumps are also Crane Demming, 40

HP 1900 GPM centrifugal pumps. The V.F.D. matches the speed of the

lead variable speed pump with the level of the wet well. When the lead pump reaches capacity, the system will put on line additional lag

pumps until the level of the wet well returns to normal.