””Thompson Pump’s3STC is a three-inch, self-priming centrifugal sewage trash pump, whichfeatures heavy-duty cast iron construction, a ductile iron impeller,quick start-up self-priming and automatic re-priming, and a dry runningmechanical seal. Designed for portable pumping, as well as permanentinstallation, the pump is a good fit for any application with liquidshaving a high concentration of solids in suspension including sewerbypasses, lift stations, and treatment plants.