What is the function of the temperature and pressure relief valve (T&P valve) on a storage tank?

What is the function of the temperature and pressure relief valve (T&P valve) on a storage tank?

• A. To release sediment
• B. To protect the storage tank from excessively high water temperature and high water pressure.
• C. To regulate water flow
• D. To act as a check valve

Answer: (B)

The main idea is that this valve is a safety device that protects the storage tank from dangerous conditions. It combines temperature and pressure relief and will open to vent water (and possibly steam) if either the water gets too hot or the pressure gets too high. By releasing the contents, it reduces both temperature and pressure to safe levels, preventing a potential tank rupture or explosion. It’s not meant to remove sediment, regulate flow, or act as a check valve. Regular testing and proper discharge piping are important, and the valve should be replaced if it leaks or won’t operate when tested.

The main idea is that this valve is a safety device that protects the storage tank from dangerous conditions. It combines temperature and pressure relief and will open to vent water (and possibly steam) if either the water gets too hot or the pressure gets too high. By releasing the contents, it reduces both temperature and pressure to safe levels, preventing a potential tank rupture or explosion. It’s not meant to remove sediment, regulate flow, or act as a check valve. Regular testing and proper discharge piping are important, and the valve should be replaced if it leaks or won’t operate when tested.