[EricH]

Originally Posted by pfreivald

First, the relief valve must be properly installed in order to do its job.

Which includes calibration. The one and only time I'd actually recommend shorting the pressure sensor is to calibrate the relief valve--and I can think of a way to test that without even involving the sensor. The idea, of course, is to run the relief valve up to about 130 psi and see if it vents before then (if not, immediately vent the system using a dump valve and readajust).