we replaced all our gas piping in our house on a homeowners permit, and it was inspected.; now how do we kill the old piping and connect the new pipes. I see the obvious solution but am afraid their is a code way I can't see.
in Texas we use black pipe underground and galvanized above ground. we repiped all the gas lines but took it only to the meter. we then put a pressure test on the lines and called for an inspection, it passed.; now we need to switchover to the new line from the meter and reconnect the gas water heater and range to the new lines.
Sounds like you're concerned about the leftover gas leaking out when you disconnect? It happens. Actually with any kind of piping when you think about it. Can't get it all out, and it just has to go somewhere.
Obviously you'll need to shut off the main valve before disconnecting.
When you're done, purge the air out of the line to all of your fixtures.
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