Which color-coded copper tubing is Type L?

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Study for the NOCTI Plumbing Test. Prepare with flashcards and multiple choice questions, each question comes with hints and explanations. Ensure your success on the exam!

Multiple Choice

Which color-coded copper tubing is Type L?

Explanation:
Color-coding helps you quickly identify the wall thickness and typical use of copper tube. Type L is indicated by blue. Type K is green (thickest, used for underground/pressurized runs), Type L is blue (medium thickness, common for many residential and some outdoor installations), and Type M is red (thinnest, for standard residential water supply). Yellow isn’t part of the standard color scheme for these tube types. So the blue-coded tubing is the Type L option.

Color-coding helps you quickly identify the wall thickness and typical use of copper tube. Type L is indicated by blue. Type K is green (thickest, used for underground/pressurized runs), Type L is blue (medium thickness, common for many residential and some outdoor installations), and Type M is red (thinnest, for standard residential water supply). Yellow isn’t part of the standard color scheme for these tube types. So the blue-coded tubing is the Type L option.

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