Bleeding a hot water system means?

• A. Releasing pressure
• B. Sealing leaks
• C. Venting excess air
• D. Filling with water

Answer: (C)

Bleeding a hot water system means venting excess air that has become trapped in the pipes or radiators. Air in the system forms pockets that block water from circulating, causing cold spots, banging noises, and reduced heating efficiency. By opening a bleed valve at the high point, you let that air escape until water flows out smoothly, indicating the air has been removed and circulation is restored. This is different from releasing pressure, sealing leaks, or filling with water, which are unrelated actions to removing air pockets.