Is this normal for a PRV?

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Is this normal for a PRV?

Author: SewageMountain3000 (PA)

House had an old PRV that was leaking so I replaced it with this:

[#$%&]

The old valve was defective so I have nothing to compare it to, there was no gauge, and plumbing had to be redone so the water was always off since all of the leaks were discovered.

I installed the valve in the exact same place per the instructions (i.e. no water in the line) and preset it to 50 PSI. Turned the water on and it holds at 50 PSI with all of the fixtures as it should. It drops to about 42 if I open up a faucet in the kitchen or the bathroom which I assume is normal. My only concern is that the valve is silent when none of the fixtures are open. But when I open any fixture, there is an audible hiss coming from the valve. Is the noise part of normal operation or is this a faulty valve?

Re: Is this normal for a PRV?
Author: bsipps (PA) In my experience a low audible hiss is normal until the system charges to static pressure
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