What type of fittings should be avoided in a drainage system?

In a drainage system, compression fittings should be avoided due to concerns related to reliability and potential leaks. Compression fittings join pipe sections using a compression mechanism, which can become loose over time due to factors like thermal expansion, vibration, or pressure changes within the system. In a drainage application, where gravity plays a significant role in the movement of wastewater, it is crucial to maintain a secure and watertight connection. Loose fittings can lead to leaks, clogs, or even backflow issues, which can compromise the integrity of the entire drainage system.

In contrast, elbow fittings, screw fittings, and wye fittings are more appropriate for drainage applications. Elbow fittings allow for changes in direction, which is often necessary in complex drainage layouts. Screw fittings provide a strong and reliable connection that can be securely tightened to prevent leaks. Wye fittings facilitate the branching of drainage lines, enabling proper flow direction and minimizing clogs. Thus, the use of compression fittings in drainage systems is discouraged to ensure long-term performance and prevent maintenance issues.