The most widely used type of plumbing pipe is PVC (polyvinyl chloride). PVC is a popular choice for water supply lines because it's durable, easy to install and relatively inexpensive. It also doesn't corrode in contact with many types of chemicals found in household products.
Copper tubing is the most common type of plumbing pipe. It is typically used for water supply lines and in warmer climates, it can also be used for refrigerant lines in air conditioning systems.
