Hot water relief valves are generally set to open at what pressure?

Hot water relief valves are typically set to open at 30 psi. This pressure setting is established to ensure safety by preventing excessive pressure buildup in hot water systems, which could lead to hazardous conditions such as leaks, ruptures, or explosions. The 30 psi mark is considered a safe operational limit for residential and commercial hot water tanks, aligning with industry standards and manufacturer recommendations.

Setting the relief valve at this pressure ensures that if the water temperature rises excessively or if there is a malfunction that causes the pressure to increase, the valve will activate to release the excess pressure, thereby protecting both the tank and the plumbing system. It's crucial for property owners to be aware of this setting, as it plays a vital role in maintaining the integrity and safety of hot water heating systems.