How often should horizontal copper pipe 1 1/4 inch and larger be supported?

For horizontal copper pipe that is 1 1/4 inch and larger, the correct supporting interval is at 10-foot intervals. This standard is in place to prevent sagging and ensure proper alignment and integrity of the piping system. Adequate support is crucial for maintaining the structural integrity of the pipes, especially in situations where they carry fluids under pressure.

The rationale behind choosing a 10-foot interval is based on the physical characteristics of copper as a material, which can experience bending or deformation if not properly supported. Maintaining this interval also helps facilitate maintenance and potential inspection of the piping system without excessive obstruction.

Supporting pipes at intervals greater than 10 feet could lead to increased stress on the joints and fittings, which may result in leaks or failures over time. Therefore, the guidelines for supporting copper piping are critical in both residential and commercial plumbing applications to ensure longevity and reliability of the piping systems.