Diaphragm pumps, the most commonly used type of positive displacement pump, include a diaphragm and chamber, as well as suction and discharge check valves to prevent backflow. Wastewater pumps are ...

Ejector sewage pumps are used when sewage cannot flow to its destination by means of gravity at a velocity of at least 2 ft. per second. There are two basic types of ejector sewage pumps. Vertically ...