What should be installed at the end of a 6 inch PVC water main?

The installation of a concrete thrust block at the end of a 6-inch PVC water main is important to provide stability and prevent movement of the pipe under pressure. When water flows through a pipeline, especially during a sudden change in direction or when valves are operated, it can create thrust forces. These forces need to be counteracted to prevent the joint from separating or the pipe from bowing, which could lead to leaks or breakage.

A concrete thrust block provides a solid anchor that distributes these forces over a larger area, securing the pipe and maintaining the integrity of the water main system. This is especially crucial in pressurized systems where the risk of displacement due to hydraulic forces is significant.

While other choices, such as a plastic cap, steel reinforcement, or a wooden block, may serve different purposes, they do not provide the necessary stability and resistance to the forces acting on a water main like a concrete thrust block does.