Which type of pipe is commonly used for potable water supply in Maine?

In Maine, the prevalent choice for potable water supply systems is PEX or copper pipe. Both options are favored for several reasons. PEX (cross-linked polyethylene) is highly flexible, making it easier to install in various environments, including tight spaces. It is resistant to corrosion and scaling, which helps maintain water quality over time. Additionally, PEX does not require joint fittings as frequently as rigid pipes, reducing the risk of leaks.

Copper, on the other hand, has been a long-standing choice in plumbing due to its durability and resistance to bacteria, making it a reliable material for transporting drinking water. Copper's natural properties prevent the growth of harmful bacteria, ensuring that the water remains safe for consumption.

While galvanized steel can also be used for plumbing, it is less commonly selected today due to its susceptibility to rust and corrosion over time, which can lead to water quality issues. PVC is used in some contexts, especially for drainage or venting, but it is not typically employed for hot water supply lines. Cast iron is mostly used in waste and vent systems rather than for potable water supply due to its weight and potential for rust.

Overall, the combination of flexibility, resistance to corrosion, and durability makes PEX or copper the most suitable choices