At what intervals should vertical 2" ABS and PVC be supported?

The appropriate interval for supporting vertical 2" ABS and PVC pipes is indeed 12 feet. This is informed by plumbing codes and best practices designed to prevent sagging, bending, or undue stress on the piping material. Support at these intervals ensures that the pipes are adequately secured and can withstand the weight of the water and any additional loads, minimizing the risk of leaks or breakage over time.

Utilizing a support interval of 12 feet allows for a balance between maintaining the structural integrity of the piping and ensuring easy installation and access for any future maintenance. This standard is widely adopted in plumbing applications, providing a reliable methodology for both residential and commercial installations.