Wondering if anyone else has a constant air "flow" audible from their PDB control valve? We've checked all of the fittings on the outside in and out, and the needle valves, etc. This "leak" or "flow" seems to be originating from inside the valve box. It's not like the tiny leaks that you'll sometimes hear from a compressed air fitting but a fuller high flow type sound. Definitely enough flow to require the compressor to come on more frequently than every 30 minutes or so it usually cycles at.

We have regulated 90psi service to the valve and the PDB is functioning normally otherwise.

Is this normal??