D J wrote:
Folks,

I am getting a new gas line in my house. So far everything is electric
(heat, water heater, cook range everything). You can understand my
aggression to go for Gas due to the electric bills.

I called up the utility company and they will run the gas line to my
house for free. Now, I have to run it inside the house (no basement).

I located a nipple outside the house, which is generally used for Gas.
One plumber also said the same.

problem is, I don't know if previous owner(s) really ran the line
already or it was just for something else.

I need to find out if the metal gas pipes are already running in my
house so before gutting the wall, I can save some money.

any ideas on how to locate it without much disturbance to walls? would
infrared cameras work?


As one poster essentially said: the other end of the pipe has to be
somewhere. If you can find another capped pipe, it should be a simple matter
to discover whether the two ends are connected (Hint: use a 12-volt
transformer and a doorbell).

Just thought of something: If you take off the existing nipple, does water
come out? If so, that's not the pipe you want.

If you could feed some sound into the pipe, maybe a stethoscope could track
its path? Have someone flog the exposed pipe with a reciprocating saw (no
blade). That should generate sufficient din to be heard down the block!