When installing a refrigeration line set through a masonry wall, what precaution should be taken?

Covering refrigeration lines with PVC when installing them through a masonry wall is important for several reasons. First, PVC acts as a protective barrier that shields the lines from moisture and corrosive elements that may be present within the masonry. This is particularly crucial, as moisture can lead to corrosion over time, which can compromise the integrity and efficiency of the refrigeration system.

Additionally, using PVC helps to reduce the risk of physical damage to the lines during installation or maintenance, as the rigid material provides a layer of protection. It also simplifies compliance with local building codes that may specify the necessity of using conduit or similar protective measures for refrigerant lines.

In contrast, leaving the lines exposed could lead to various issues, including potential damage and accessibility problems during maintenance. Insulating the lines with rubber is important for thermal performance, but this does not address protection against moisture infiltration that PVC offers. Painting the lines might provide some level of protection but would not be as effective as a dedicated casing like PVC in protecting against environmental factors.