After flushing and cleaning holding tanks during winterization, what should you do with each tank?

Closing the termination valves after flushing and cleaning holding tanks during winterization is important for maintaining the integrity of the system. This step helps to prevent any contaminants from entering the tanks, which could occur due to backflow or leakage when the tanks are not in use. Additionally, sealing the valves minimizes the risk of freeze damage, as it prevents cold air from entering the system and reduces the likelihood of any residual liquids spilling out or evaporating. Proper closure of the termination valves helps in ensuring that the tanks remain clean and ready for use when the season changes, promoting effective sanitation and preventing potential issues during the next operational period.