What is the role of temperature and pressure relief valves in water heaters?

The function of temperature and pressure relief valves in water heaters is crucial for safety. These valves are designed to release water when either the temperature or the pressure in the tank exceeds safe limits. By doing so, they prevent potential hazards such as tank ruptures or explosions that could occur if excessive heat or pressure builds up.

Water heaters operate under certain conditions, and when those conditions become unsafe, the relief valve acts as a safety mechanism, ensuring that the system can vent excess pressure or temperature. This is essential for maintaining the integrity of the water heating system and ensuring the safety of the environment in which it operates. Thus, the correct answer emphasizes the key protective role these valves play in safeguarding against dangerous situations related to overheating and over-pressurization.