Final answer:
PEX tubing is used for potable water plumbing systems, providing a durable and easy-to-install option for clean water delivery in homes and buildings.
Step-by-step explanation:
PEX tubing, which stands for cross-linked polyethylene, is primarily used for potable water plumbing systems. This versatile plastic piping offers a number of benefits that make it a popular choice for delivering clean water to homes and buildings. PEX is flexible, resistant to scale and chlorine, doesn't corrode or develop pinholes, has fewer connections and fittings which reduces the chances for leaks, and it's quicker to install than metal or rigid plastic piping. It's not suitable for outdoor use because of its sensitivity to UV light, nor is it used for gas distribution, steam heating, or wastewater systems. In modern construction and renovations, PEX is frequently chosen for its durability and ease of installation for water supply lines.