Which of the following is a common material for rigid piping?

Rigid piping is typically made from materials that can withstand pressure and maintain their shape under various conditions. PVC, or polyvinyl chloride, is widely recognized as a common material for rigid piping due to its excellent strength-to-weight ratio, resistance to corrosion, and effectiveness in a variety of plumbing applications, including water distribution and drainage systems.

PVC pipes are also easy to install, relatively inexpensive, and can be produced in different diameters, making them versatile for both residential and commercial plumbing systems. The chemical properties of PVC allow it to resist harmful substances, which makes it suitable for different types of liquids and gases.

Other options like rubber, silicon, and polyethylene are used in plumbing for specific applications—such as flexible connections or specialized fittings—but they do not typically qualify as rigid piping materials, which are the focus of this question. Rubber and silicon, for instance, are more flexible and often used as seals or for applications where flexibility is essential, while polyethylene, while durable, is generally considered a flexible piping material rather than rigid.