International Compliance Association (ICA) Home Inspector Practice Exam

What is the primary purpose of installing a temperature and pressure relief valve on a water heater?

1. To improve water flow

2. To prevent overheating and pressure buildup

3. To regulate the water temperature

4. To save energy

The correct answer is: To prevent overheating and pressure buildup

The primary purpose of installing a temperature and pressure relief valve on a water heater is to prevent overheating and pressure buildup. This safety mechanism is crucial in ensuring the safe operation of a water heater, as it protects the system from excessive pressure that can lead to a catastrophic failure, such as an explosion. When water is heated in the tank, it expands, and if the temperature exceeds the designed limits, or if the pressure builds up beyond safe levels, the relief valve activates. It releases water (and pressure) to prevent the tank from bursting or sustaining damage. This valve is essential in maintaining the proper and safe functionality of the water heater, making it a vital component for household safety. Other options, while they might pertain to various water heater functionalities, do not capture the primary safety role that the temperature and pressure relief valve serves. For instance, improving water flow, regulating temperature, or saving energy are considerations but are not the main function of this specific safety device.