What is the purpose of having a high-low pipe fitting?

The purpose of a high-low pipe fitting is primarily to accommodate thermal expansion. When pipes heat up, they expand, and when they cool down, they contract. A high-low fitting is designed to allow flexibility in a piping system, which helps manage the changes in length due to temperature variations, thus preventing stress and potential damage to the pipes.

While ensuring proper flow, avoiding misalignment, and preventing leaks are important aspects of pipe fitting, they do not adhere directly to the function of a high-low fitting. Specifically, this type of fitting provides the necessary adjustment in elevation to account for thermal movements, thereby maintaining the integrity and functionality of the piping system under varying temperatures.