Which of the following materials is commonly used for water supply piping in residential plumbing?

The choice of Copper, PEX, or CPVC for water supply piping in residential plumbing is widely favored due to several important factors.

Copper is highly durable, resistant to corrosion, and has been a tried-and-true material for decades, providing reliable service and good heat transfer properties. Its natural antimicrobial properties also help in maintaining water quality.

PEX (cross-linked polyethylene) offers flexibility, which simplifies installation and allows for fewer joints and fittings. It is also resistant to scale and chlorine, and it does not corrode. This makes PEX an increasingly popular choice, especially for retrofits and new construction where ease of installation is a priority.

CPVC (chlorinated polyvinyl chloride) is excellent for hot water applications and is also resistant to corrosion and scaling. It provides an advantage in terms of cost and ease of installation compared to metal piping.

These materials collectively address various needs in the plumbing system, including cost-effectiveness, durability, ease of installation, and performance under varying temperature conditions, making them the preferred choice for water supply piping in residential settings.