Which color identifies Type M copper tubing?

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Multiple Choice

Which color identifies Type M copper tubing?

Explanation:
Color coding helps installers quickly identify the type of copper tube and its wall thickness, which relates to its pressure rating and suitable applications. Type M has the thinnest wall among the common potable-water tubes, making it a cost-effective choice for typical residential supply lines. To make this identification fast on site, manufacturers use a standard color scheme: red for Type M, blue for Type L, and green for Type K. So red identifies Type M copper tubing. When selecting tube and fittings, this color cue should align with the expected pressure and application, and you should also check any stamped markings on the tube for confirmation.

Color coding helps installers quickly identify the type of copper tube and its wall thickness, which relates to its pressure rating and suitable applications. Type M has the thinnest wall among the common potable-water tubes, making it a cost-effective choice for typical residential supply lines. To make this identification fast on site, manufacturers use a standard color scheme: red for Type M, blue for Type L, and green for Type K. So red identifies Type M copper tubing. When selecting tube and fittings, this color cue should align with the expected pressure and application, and you should also check any stamped markings on the tube for confirmation.

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