What is one of the functions of a temperature and pressure relief valve?

A temperature and pressure relief valve (TPR valve) plays a crucial role in maintaining the safety and efficiency of a hot water system. Its primary function is to prevent overheating and excess pressure from building up in the system.

When water is heated, it expands and the pressure within the tank can increase. If this pressure reaches a dangerous level, the TPR valve opens to release water, thus lowering the pressure and allowing steam to escape. This mechanism is essential in preventing potential explosions or damage to the water heater and plumbing system.

Understanding the importance of the TPR valve highlights why maintaining it and ensuring it operates correctly is vital for any hot water system. Regular testing and inspections can help ensure that the valve functions properly when necessary, thereby protecting both the system and the users.