Before backfilling header trenches, what must be done according to the code?

Before backfilling header trenches, it is essential to perform a pressure test on the assembled loop system as this step ensures the integrity and functionality of the system. Conducting a pressure test allows for the identification of any leaks or weaknesses in the piping, joints, or connections that could lead to problems once the trench is backfilled and sealed.

This step adheres to safety standards and code requirements, helping to prevent future failures that could result in costly repairs and system inefficiencies. Once the pressure test is successfully completed and the system is verified to be leak-free, backfilling can occur with confidence that the system has been installed correctly and is operational.