Is it necessary to allow all the pressure to escape from the reservoir to remove accumulated moisture?

Allowing all the pressure to escape from the reservoir is not necessary to remove accumulated moisture. Removing moisture can often be achieved by using a drain valve designed for that purpose, which allows moisture to be expelled without completely venting the system. This method is efficient and helps maintain the required air pressure for braking performance.

Monthly maintenance checks generally include draining moisture to prevent corrosion and maintain system integrity, but it does not require fully depleting the system of air pressure. Therefore, while it is important to manage moisture levels effectively, completely releasing all pressure is not a prerequisite for this task.