Either way is acceptable. I personally don't like going around with a match
or lighter, because you can miss a small leak.

"RobertM" wrote in message
...
Sacramento Dave wrote:
"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.


They make a test gauge for gas it has a 3/4 female pipe thread the body
has
a gauge attached and a Schrader (sp) valve for a bicycle pump. 15 psi is
normal for residential in my area. I would pump it up and soap the
joints. I
can't remember the Time to hold pressure. The PSI can vary From area to
area
Type of line welded . Check Local Codes. Remember it's gas so you want
to
do it right. test gauge
http://uniweld.com/catalog/gauges_th...est_gauges.htm
3/4"
FPT Hex-Body


When I was in Arizona they pressurized to 14 psi and waited 24 hours.
Here in Tennessee, they turn on the propane and soap the joints. If the
house is still there 20 minutes later, they figure it's ok.

Bob