What is the purpose of using an expansion joint in drainage systems?

The purpose of using an expansion joint in drainage systems is to accommodate thermal expansion and contraction. As temperatures change, materials such as pipes can expand or contract, which might cause stress and potential failure in rigid piping systems. Expansion joints are designed to absorb this movement, ensuring that the integrity of the piping system is maintained and preventing damage from stress caused by thermal changes.

Incorporating expansion joints can extend the lifespan of the drainage system, reduce the likelihood of leaks or breaks, and enhance overall system performance. Without these joints, the natural movement resulting from temperature variations could lead to misalignment, increased wear, and catastrophic failure over time. Thus, the inclusion of expansion joints is crucial in effective plumbing design to manage the mechanical behavior of pipes under temperature fluctuations.