What is a common type of pipe used in plumbing systems?

Both copper and plastic pipes are widely used in plumbing systems, making the choice of both materials the correct answer. Copper piping has been a traditional standard for plumbing due to its durability, resistance to corrosion, and antibacterial properties. It is commonly utilized in water supply lines, heating systems, and in residential applications.

On the other hand, plastic piping, which includes materials like PVC (polyvinyl chloride) and PEX (cross-linked polyethylene), has gained popularity for its lightweight nature, ease of installation, chemical resistance, and lower cost compared to copper. Plastic is frequently used for drain, waste, and vent (DWV) systems as well as for hot and cold water supply lines.

The versatility and unique advantages offered by both copper and plastic pipes mean that professional plumbers often rely on both materials depending on the specific requirements of a project. Therefore, recognizing the importance of both in modern plumbing systems is essential.