do i need to be present on a city gas line pressure test inspection?

[Ricardo G.]

or can I just leave everything hooked up andthe gauge connected to the main line, so that the inspector can see there's no leaks. I

got the permit as a homeowner, because I'm not a licensed plumber. Thanks. San Antonio tx.

[Seth Teel]

If it is already tagged and you are acting as homeowner, you can install the pressure tester, they will come by and check it. Again, if they detect a drop in pressure beyond a certain PSI, then tag goes back on and license contractor must be present for next test. My experience may be a little different because I was living in the property and originally called CPS for a smell of gas (worst idea ever).  I should have just called my plumber.  

Sounds like you're in the home stretch.  Good luck.