At what pressure psi is the pressure-relief valve on low-pressure boilers set to open?

The pressure-relief valve on low-pressure boilers is typically set to open at 15 psi. This specification is significant because it serves as a safety mechanism to prevent overpressure conditions within the boiler system, which could lead to hazardous situations, such as ruptures or explosions.

The importance of having the relief valve set at this pressure is tied to the operational safety standards established in various building codes and industry guidelines. A pressure setting of 15 psi is adequate to maintain proper functional pressure while ensuring that, in the event of a malfunction or other pressure-related issues, the safety valve activates to relieve excess pressure, thereby protecting both the boiler and the overall system.

While other pressures such as 10 psi, 12 psi, and 20 psi could be considered for different applications, they are not standard for low-pressure boilers, which reinforces the relevancy of the 15 psi setting within this context. This standardization helps ensure consistent safety practices across various installations and maintenance protocols.