A sump pump in a commercial building sits in a sump at an elevation of 150.4 ft. The pump delivers 40 gal/min of water through a piping system that discharges the water at an elevation of 172.8 ft. The pressure at the pump discharge is 15.0 psig. The fluid is water at 60°F. Specify the required size of plastic pipe if the system contains the following elements.
■ A ball-type check valve
■ Eight standard elbows
■ A total length of pipe of 55.3 ft

The pipe is available in the same dimensions as Schedule 40 steel pipe.