Copper and plastic are both commonly used in plumbing systems, but they have different properties and are best suited for different applications.
Copper pipes are durable, long-lasting, and resistant to corrosion. They are often used for both hot and cold water supply lines, as well as for natural gas and propane lines. Copper is also a good conductor of heat, making it a popular choice for radiant heating systems.
Plastic pipes, on the other hand, are lightweight, easy to install, and resistant to corrosion. They are often used for drainage and waste systems, as well as for cold water supply lines. The two most common types of plastic pipes used in plumbing are PVC (polyvinyl chloride) and PEX (cross-linked polyethylene). PVC is most commonly used for drainage and vent systems, while PEX is used for hot and cold water supply systems.
In summary, Copper pipes are best used for hot and cold water supply, natural gas and propane lines, and radiant heating systems. Plastic pipes are best used for drainage and waste systems and cold water supply lines.