What is the purpose of venting and overflow on a cold water storage tank?

• A. To allow air to escape and prevent pressure buildup
• B. To heat the stored water
• C. To filter solids
• D. To drain water away when full

Answer: (A)

Venting lets air escape as the tank fills, and it prevents pressure from building up inside the tank. If air can’t escape, trapped air can resist filling and the system can experience stress or slower operation. The overflow acts as a safety outlet for any water that rises above the tank’s capacity, preventing spills and backflow. So the main idea is that venting controls air flow to keep filling smooth and pressure safe, while the overflow provides a drainage path for excess water.