Type K or L soft copper is permissible when placed in which orientation in a partition on remodel only?

The correct answer indicates that Type K or L soft copper can be placed in a vertical orientation within a partition during a remodel. This orientation is significant because vertical installation allows for proper drainage and minimizes potential pooling of any moisture that may accumulate within the piping.

When installed vertically, the natural flow of any condensation or water allows it to drain away, reducing the risk of corrosion or other issues related to water accumulation. Local codes often have specific guidelines regarding the installation of copper piping to prevent water-related problems, which is why this orientation is the permissible option in remodel scenarios.

Other orientations, like horizontal or diagonal placement, may not provide the same benefits for drainage, potentially leading to water gathering within the pipes. Inverted orientation would also not be suitable as it could cause similar issues. Understanding these installation principles is critical for ensuring the longevity and functionality of plumbing systems in remodeled spaces.