Where should a pressure relief valve be installed on a hydronic piping system that has reduced pressure?

In a hydronic piping system with reduced pressure, the pressure relief valve should be installed on the low pressure side of the system. This is critical for ensuring safe operation and preventing equipment damage. The primary purpose of a pressure relief valve is to protect the system from overpressure conditions that could lead to catastrophic failure.

By placing the relief valve on the low pressure side, it can accurately measure and respond to any excess pressure that may occur in that section of the system. If the valve were installed on the high pressure side, it would not effectively relieve pressure that exceeds safe limits, potentially allowing dangerous conditions to develop. This strategic placement helps to maintain the integrity of the system and ensures that any pressure that exceeds the acceptable limits is safely released, thus protecting all components involved.

In summary, installing the pressure relief valve on the low pressure side is the correct approach as it effectively manages the risk of overpressure in a hydronic system with reduced pressure, ensuring operational safety.