One older technician for our local gas company goes around to each joint
with a match. I like to use soapy water. You can also put a tee in the line
with a Schrader valve and use an electronic tire pressure gauge. Any
pressure drop is not acceptable. DO NOT put water inside the tubing.

"renux" wrote in message
ups.com...
We need to test a gas copper line for leaks and we're currently using
water at about 115 psi and a pressure gauge, but I am not sure this is
the right approach.

I'd like to ask what is the standard procedure to test a gas copper
line for leaks.

Is water or air used?

At what pressure?

For how long?

What would be an acceptable drop in pressure in this period of time?

Can an unexpensive pressure gauge ($15 or so) be used with water or
air?


Thanks a lot in advance.