Which copper tubing type has the thinnest wall and is used for low-pressure applications?

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Multiple Choice

Which copper tubing type has the thinnest wall and is used for low-pressure applications?

Explanation:
Wall thickness governs how much pressure a copper tube can safely carry. In standard copper tube, the wall thickness runs from thickest to thinnest as K, then L, then M. Because it has the thinnest wall, this type is rated for the lowest pressures and is typically used for low-pressure domestic plumbing. Soft and rigid describes the tube’s temper (how easily it bends) rather than its wall thickness, so it isn’t a criterion for pressure rating. Therefore, the choice that has the thinnest wall and is used for low-pressure applications is Type M.

Wall thickness governs how much pressure a copper tube can safely carry. In standard copper tube, the wall thickness runs from thickest to thinnest as K, then L, then M. Because it has the thinnest wall, this type is rated for the lowest pressures and is typically used for low-pressure domestic plumbing. Soft and rigid describes the tube’s temper (how easily it bends) rather than its wall thickness, so it isn’t a criterion for pressure rating. Therefore, the choice that has the thinnest wall and is used for low-pressure applications is Type M.

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