How long should ground source heat pump loop systems be pressure tested at 100 psig?

Ground source heat pump loop systems should be pressure tested at 100 psig for a duration of 30 minutes. This time frame is considered sufficient to ensure that any leaks or weaknesses in the system are detected. During this pressure test, not only does the system need to be checked for integrity, but it also allows for any necessary adjustments or repairs to be identified before the system is put into operation.

The chosen duration aligns with industry standards, which aim to minimize the risk of future failures caused by undetected leaks. Testing for 30 minutes provides a balance between thoroughness and practicality, ensuring that the loop system can hold the designated pressure without significant loss, confirming its reliability and safety.