Having just switched gas suppliers...
Propane for propane, but we ran into the same issue. The incoming crew managed to loosen a pipe joint inside the house when they reefed on the regulator to get to the mfg. date. (Which is on the back side, FFS!)
The joint that let loose was on the steel standpipe where the appliance lines tap off from. I would suspect something like that before the shut-off valves.
Regardless of all that, the usual way to chase down a gas leak is to spray soapy water on the suspected spots. The bubbles will give the leak away.
My wife was the one present for the swap-out and she's out of town (in a cell phone dead zone...) I'll update the post with the conditions under which the pressure test was performed if I can get a hold of her.
The joint that let loose was on the steel standpipe where the appliance lines tap off from. I would suspect something like that before the shut-off valves.
Regardless of all that, the usual way to chase down a gas leak is to spray soapy water on the suspected spots. The bubbles will give the leak away.
My wife was the one present for the swap-out and she's out of town (in a cell phone dead zone...) I'll update the post with the conditions under which the pressure test was performed if I can get a hold of her.
