What is the flexible plastic plumbing pipe called?

The flexible plastic Plumbing pipe is commonly known as PEX, which stands for cross-linked polyethylene. It is widely used for water supply lines in residential and commercial plumbing due to its flexibility, resistance to scale and chlorine, and ease of installation. PEX can be bent around corners and does not require joint fittings for many applications, making it a popular choice among plumbers.