TM 10-4630-206-12&P
SEWAGE EJECTION PUMP (SEP)
THEORY OF OPERATION
THEORY OF OPERATION
General
The function of the SEP is to serve as a collection and evacuation facility for graywater sewage generated
during Force Provider operations. The laundry SEP (9-1-0150-1) was designed to collect and evacuate
graywater generated by the Containerized Batch Laundry FP (CBL-FP) washers, while the general
purpose SEP (9-1-0150-2) is used to collect the graywater generated by kitchens and shower facilities.
The Waste Water Evacuation SEP (9-1-0527) is suitable for either application without adaptation.
Operation
Graywater sewage is fed from the source point into the SEP. At the SEP, the liquid sewage accumulates
in the tank until it reaches 80% of tank capacity, at which point a float switch activates the pump,
evacuating the liquid sewage. The discharge port includes a check valve that prevents backflow into the
tank from the discharge line. In cold weather operations a heating element prevents the contents from
freezing.
Evacuation
The discharge port is usually connected to the Force Provider System wastewater grid. However, it may
be adapted to an existing municipal sewage system, a 20,000-gallon fabric graywater collection tank, or
other approved graywater disposal.
3-IN. Graywater
Check Valve
Inlet From CBL-FP
2 -IN. Graywater
Discharge to
3-IN.
PUMP
Disposal or
Plug
Holding Facility
3-IN. Graywater
Inlet From CBL-FP
Laundry SEP Operation
9-1-0150-1
0003 00-1
