What is the purpose of using a relieving arch or pipe sleeve when a pipe passes through a wall?

Using a relieving arch or a pipe sleeve when a pipe passes through a wall primarily serves to protect the pipe from breakage. This protective measure accommodates any potential movement or settlement of the building structure.

As buildings settle, the walls might exert pressure on the pipes, leading to stress and potential fractures. The relieving arch or sleeve offers a buffer space that absorbs some of this pressure, ensuring the integrity of the pipe is maintained. This is particularly important in plumbing systems, as a broken pipe can lead to significant water damage and costly repairs.

While other factors such as noise limitation or rust prevention might be considered in some contexts, the primary focus of installing a relieving arch or sleeve is the structural protection of the piping system, making it essential in maintaining overall system reliability.