What is the minimum required vent size for a sump with a sewage pump having a discharge capacity of 60 gallons per minute?

• A. 1 inch
• B. 1 ½ inches
• C. 2 inches
• D. 2 ½ inches

Answer: (C)

The minimum required vent size for a sump with a sewage pump having a discharge capacity of 60 gallons per minute is indeed 2 inches. This requirement is primarily based on the need to ensure proper venting for air circulation within the plumbing system, especially in systems that handle sewage.

Using a 2-inch vent allows for adequate airflow, which helps prevent issues such as siphoning or back pressure that can occur when a pump discharges wastewater. Furthermore, the size of the vent is crucial to accommodate the volume and velocity of the gases that will be generated within the sewage system. Adequate venting prevents the build-up of harmful gases and ensures that sewage pumps operate efficiently, reducing the risk of malfunctions.

In plumbing codes, the sizing standards for vents are established to ensure safety and functionality, considering different variables like discharge rates. The choice of a 2-inch vent for a sewage pump with a significant capacity of 60 gallons per minute aligns with these safety standards, making it essential for effective drainage and overall system performance.