Which color identifies Type K copper tubing?

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Multiple Choice

Which color identifies Type K copper tubing?

Explanation:
Copper tubing is color coded to show its type and wall thickness. Type K has the green color, which signals the thickest-walled, highest-pressure tube used for main supply lines and underground service. This color coding helps installers pick the right tube for the job and avoid using a thinner-walled type in high-pressure or buried applications. For context, blue typically marks Type L and red marks Type M, with yellow often associated with DWV in some systems. So the green color directly identifies Type K.

Copper tubing is color coded to show its type and wall thickness. Type K has the green color, which signals the thickest-walled, highest-pressure tube used for main supply lines and underground service. This color coding helps installers pick the right tube for the job and avoid using a thinner-walled type in high-pressure or buried applications. For context, blue typically marks Type L and red marks Type M, with yellow often associated with DWV in some systems. So the green color directly identifies Type K.

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