Where is copper type M allowed to be installed for water piping?

Where is copper type M allowed to be installed for water piping?

• A. Above Ground
• B. Below Ground
• C. In Concrete
• D. In Concrete Block

Answer: (A)

Copper Type M is the thinnest-walled copper tubing used for potable water. Because of its thinner wall, it has a lower pressure rating and is more susceptible to damage from moisture and physical impact. The code allows this tubing where it will stay above ground, in dry, protected locations where leaks can be detected and repaired relatively easily. Placing it underground or embedded in concrete or concrete block subjects the tubing to moisture, soil chemicals, and movement, which can lead to hidden leaks and corrosion or failure. In those environments, more robust copper types or other approved materials are used. So, copper Type M is allowed above ground, but not below ground or embedded in concrete.

Copper Type M is the thinnest-walled copper tubing used for potable water. Because of its thinner wall, it has a lower pressure rating and is more susceptible to damage from moisture and physical impact. The code allows this tubing where it will stay above ground, in dry, protected locations where leaks can be detected and repaired relatively easily. Placing it underground or embedded in concrete or concrete block subjects the tubing to moisture, soil chemicals, and movement, which can lead to hidden leaks and corrosion or failure. In those environments, more robust copper types or other approved materials are used. So, copper Type M is allowed above ground, but not below ground or embedded in concrete.