I'm using a single stage, single gauge regulator and no solenoid.
I opened the tank valve and the regulator shows about 1000 psi. To test for a secure connection between the tank and regulator, I shut the tank valve and left it standing for about 48 hours.
The PSI gauge has dropped about 100 psi.
Is there a confirm leak?
But I tested with soapy water around all connections and I couldn't detect a leak.