How does a hydrotest differ from a “leak detection test with water”?

In a hydrotest, testing is done at a clearly defined test pressure, often according to a standard, and in addition to visible leakage, strength and any permanent deformation are also examined. A simple “leak detection test with water” can consist of filling a system to a modest pressure to detect assembly errors. Both are pressure tests, but a standardized hydrotest has stricter requirements for test pressure, test duration, temperature, and evaluation.