A method for controlling a pump unit includes controlling the pump unit based on a determination of a combination of an inducer and a centrifugal pump at least on parameters of total volumetric flow rate and pressure difference over the pump unit, and controlling the pump unit based on a surface level on a suction side of the pump unit, and an NPSHaA at an inlet before the pump unit is measured, calculated or otherwise determined, and, the output power of the inducer is increased or decreased to affect a NPSHaB at the flow channel before the impeller, so that during operation of the pump unit the NPSHaB is greater than a NPSHr of the centrifugal pump.

A pump is provided, comprising: a base with a first side having a first inlet, a second side having a second inlet and a first outlet, a third side having a second outlet, and a fourth side, wherein the inlets are coupled to a pump motor assembly configured to deliver water from the inlets to a discharge cover, and wherein the outlets are coupled to a sensor pipe configured to deliver water from the discharge cover to the outlets; and a cover with first and second priming ports and an interface on the front, and configured to mount to a housing in a first orientation wherein the front is adjacent the second side and the first priming port is aligned with the discharge cover, and a second orientation wherein the front is adjacent the fourth side and the second priming port is aligned with the discharge cover.

A pump is provided, comprising: a base with a first side having a first inlet, a second side having a second inlet and a first outlet, a third side having a second outlet, and a fourth side, wherein the inlets are coupled to a pump motor assembly configured to deliver water from the inlets to a discharge cover, and wherein the outlets are coupled to a sensor pipe configured to deliver water from the discharge cover to the outlets; and a cover with first and second priming ports and an interface on the front, and configured to mount to a housing in a first orientation wherein the front is adjacent the second side and the first priming port is aligned with the discharge cover, and a second orientation wherein the front is adjacent the fourth side and the second priming port is aligned with the discharge cover.