What is the minimum pressure at which a hydronic system should be tested?

In hydronic systems, the minimum pressure at which a system should be tested is typically considered to be 100 psig. This pressure threshold is based on ensuring that the entire system, including pipes, fittings, and valves, is adequately tested for leaks and structural integrity. Testing at 100 psig provides a buffer above the normal operating pressures encountered in most hydronic systems, which helps to identify any potential weaknesses that could lead to failures under regular operational conditions.

By conducting tests at this level, technicians can ensure that the system is capable of handling variations and potential surges in pressure without compromising safety or performance. It is a industry-standard practice to maintain safety margins that account for various factors, such as temperature fluctuations and water expansion. Testing at 100 psig is a proactive measure to ensure reliability and functionality in hydronic heating and cooling applications.