What are the common access points of a gravity sewer system?

The correct answer identifies the various access points of a gravity sewer system, which includes manholes, lift stations, building connections, junction chambers, and terminal cleanouts.

In a gravity sewer system, manholes serve as essential access points for maintenance and inspection, allowing workers to enter the sewer lines to conduct necessary repairs or to remove blockages. Lift stations may not be present in all gravity systems, but they play a role in situations where the terrain requires assistance to move the wastewater to a higher elevation. Building connections are critical because they link individual properties to the main sewer line, facilitating the transport of wastewater from homes and businesses. Junction chambers are designed to manage flow from multiple sewer lines and ensure the system operates efficiently, while terminal cleanouts provide access for cleaning and maintenance at the end of a sewer line.

This comprehensive list underscores the necessity of each component in ensuring that a gravity sewer system operates effectively and is easily maintainable. Each access point plays a unique role in the overall function and upkeep of the sewer system. Other choices fail to encompass all these critical access points, limiting the understanding of how gravity sewer systems function and are maintained.