What is the maximum temperature setting for a temperature relief valve protecting a water heater?

The maximum temperature setting for a temperature relief valve protecting a water heater is 210°F. This standard is established to ensure the safety of the system and to prevent excessive pressure build-up.

Temperature relief valves are critical safety devices that prevent the water heater from reaching dangerously high temperatures. If water in the tank exceeds this temperature, it can lead to significant safety hazards, including the risk of explosion due to rapid steam generation. Setting the maximum temperature at or below 210°F ensures that the heating system operates efficiently without posing safety risks.

While other temperatures might seem plausible, they exceed the generally accepted safety limits outlined in various plumbing codes and standards, including the International Residential Code. Therefore, a setting of 210°F strikes a balance between effective operation of the water heating system and maintaining safety for residential use.