What should be done if there is a significant change in the direction of piping?

When there is a significant change in the direction of piping, providing auxiliary drains is a critical action because it helps to manage potential issues such as water accumulation and pressure changes within the system. Changes in direction can create areas where water may not flow as efficiently, leading to the risk of stagnant water or even traps where debris can accumulate. Auxiliary drains allow for the removal of this water, helping to maintain the system's efficiency and ensuring that the sprinkler system operates effectively without clogging or damage.

Additionally, auxiliary drains can prevent issues related to frozen pipes in colder climates, as they allow for any potential water to drain and avoid freezing conditions. This preventive action is crucial for the longevity of the system and for maintaining compliance with safety and operational standards. In comparison, rerouting pipes, increasing pipe diameter, or installing additional pumps do not directly address the potential problem of stagnant water caused by the direction changes in piping.