____________________ is the minimum vent pipe size from a sump or receiving tank for a sewage pump system?

The minimum vent pipe size from a sump or receiving tank for a sewage pump system is 1-1/2 inches. This size is specified in plumbing codes to ensure adequate ventilation of the system. Proper venting is crucial because it allows air to enter the pump system, which helps prevent vacuum formation that could impede the flow of sewage. Venting also serves to release gases that can build up in the sump or tank, reducing the risk of odor and potential health hazards from sewage gases.

Choosing the appropriate vent size is important to maintain the efficiency and safety of the sewage pump system. A vent pipe that is too small may not adequately handle the airflow needed, which can lead to operational issues, whereas larger sizes may not be necessary and could lead to unnecessary costs and installation complexity. Therefore, the standard of 1-1/2 inches balances efficiency, effectiveness, and safety in sewer systems.