Review on 💧 Lead-Free Brass Water Pressure Regulator Valve with Gauge and Inlet Filter for RV, 3/4 and NH Thread - MICTUNING by Dan West

Looks like a very good regulator, solid brass construction. It was well packaged and securely packed in foam packaging. Unfortunately, the gauge itself read 10psi while still in the box. While I don't expect this thing to be a calibrated item, do I expect the needle to be at zero when zero pressure is applied? RV water systems should not have system pressures in excess of 45psi to avoid catastrophic leaks. an error factor of about 25% is simply not acceptable.