What type of tubing is acceptable for both hot and cold water applications?

PEX, or cross-linked polyethylene, is a type of flexible plastic tubing that is widely used in plumbing systems for both hot and cold water applications. Its unique properties allow it to withstand a range of temperatures, making it suitable for conveying hot water without deforming or losing integrity.

One of the main advantages of PEX is its resistance to scale and chlorine, as well as lower shipping costs due to its lightweight nature. PEX also has a high thermal resistance, which means it can handle the thermal expansion and contraction that occurs with fluctuating water temperatures. Additionally, PEX tubing is less susceptible to corrosion and allows for easier installation, particularly in retrofitting applications or complex plumbing layouts.

In contrast, other options have limitations in terms of their application. CPVC is suitable for hot water but can become brittle over time when exposed to UV light. PVC is primarily utilized for cold water applications and not designed to handle hot water. Cast iron, while durable and traditionally used for drain, waste, and vent applications, is not practical for hot and cold water supply lines. Therefore, PEX stands out as the ideal choice for both hot and cold water systems.