The answer to 'types of pipe' is that there are several common types of pipes used in plumbing systems, each with their own advantages and applications. The most common types of pipes include copper, PVC (polyvinyl chloride), CPVC (chlorinated polyvinyl chloride), PEX (cross-linked polyethylene), and galvanized steel.
Copper pipes are durable, corrosion-resistant, and often used for water supply lines, while PVC and CPVC pipes are commonly used for drain, waste, and vent (DWV) systems. PEX pipes are flexible, easy to install, and resistant to freezing, making them a popular choice for both hot and cold water supply lines. Galvanized steel pipes were commonly used in older homes but are now less common due to their susceptibility to corrosion over time.