What is the minimum pressure for hydrostatic testing of hydronic piping systems?

The minimum pressure for hydrostatic testing of hydronic piping systems is 100 psi. This standard is established to ensure the integrity and safety of the piping system before it is put into service. The hydrostatic test helps to verify that the system can withstand pressures higher than those it will typically encounter during operation.

Testing at this pressure allows for identifying any leaks, weaknesses, or potential failures in the piping material or connections. It is important to exceed the normal operating pressures to provide a safety margin that ensures the system will perform safely under the pressures it will experience during regular use. This practice is critical for maintaining system reliability and preventing catastrophic failures.

In the context of the choices provided, 100 psi is the most commonly accepted minimum for this type of testing, reflecting industry standards and regulatory requirements. This ensures not only the functionality of the system but also the safety of the building occupants and the surrounding environment.