A tank water heater uses a combination temperature-and-pressure relief valve. Under 2024 IRC P2804.4 and P2804.5, which statement correctly describes the temperature-relief installation and setting?
- AThe sensing element must monitor water at the bottom of the tank
- BA side mounting location by itself establishes full compliance
- CThe temperature setting may exceed 210°F whenever the pressure setting is below 150 psi
- The sensing element must monitor water within the top 6 inches of the tank, and the temperature setting must not exceed 210°F
Where to look it up
https://codes.iccsafe.org/content/IRCSP2024P1/capitulo-28-calentadores-de-agua-water-heaters
Why D is correct
P2804.4 specifies the temperature-sensing location within the tank’s top 6 inches and a maximum opening temperature of 210°F. P2804.5 applies the separate temperature and pressure requirements to a combination valve. A universal side-only mounting claim does not follow: the actual connection must establish the required sensing location and comply with the equipment instructions and other applicable provisions. P2804.3 separately regulates pressure rating and setting. The publisher’s January 2026 Spanish edition of the 2024 IRC supplies the verified text; the requirements are paraphrased in English here. Source: https://codes.iccsafe.org/content/IRCSP2024P1/capitulo-28-calentadores-de-agua-water-heaters