I understand how this will be perceived by some since I’m not a licensed plumber. However, I’m not going to pay a licensed plumber $2000 for installing gas pipe. (Yes, I did go through the effort of getting an on-site estimate from a licensed plumber.) It’s just not going to happen. (Yes, I understand the consequences.)
I need to install gas line (black steel pipe) in order to supply gas for a gas dryer. I’ve removed the drywall and see all the pipe in the wall that I will be working on. I’ll need to replace a few tees, replace some pipe, add some pipe, and so on. I’ll be using pipe dope (Rectorseal) for the fittings, drilling holes through the studs, and so on. I will also purchase a manometer and hook it up to perform a pressure test (not relying on liquid and bubbles).
I’m not going to do it until I'm confident that I'm doing it as safe as I personally can (personally, as in without paying a licensed professional).
My question is: when I shut off the valve at the gas meter, if I just open the gas line, there will still be gas in the lines that will escape. In order to perform this procedure most safely, what is the best way to evacuate gas from the gas lines prior to opening the gas lines? Should I just shut off the valve at the gas meter and then run the water heater until the pilot light goes out (observed by visual inspection)? (I don't have a gas range, so I can't run a stove and watch the burners.)