G2 Gas Fitter Exam 2025 – 400 Free Practice Questions to Pass the Exam

Gas-fired water heaters must always include a temperature and pressure relief valve for safety reasons. This component is crucial in preventing dangerous situations that can arise from excessive temperature or pressure buildup within the water heater tank.

When the water heats up, it expands, and if there is a malfunction or failure in the heating system, pressure can increase to a level that poses a risk of explosion. The temperature and pressure relief valve acts as a safety mechanism by allowing excess pressure and temperature to escape, venting hot water and steam, and thereby protecting the integrity of the tank and the surrounding area.

In contrast, while features like automatic ignition systems, high limit controls, and regular maintenance schedules contribute to the safety and efficiency of gas-fired water heaters, they do not serve the same critical protective role as the temperature and pressure relief valve. Without this valve, the water heater could operate in an unsafe condition, leading to potentially hazardous outcomes.