Pressure Testing a Gas Line! How to Pressure Test Natural Gas and Propane Lines Correctly!

Pressure Testing a Gas Line! How to Pressure Test Natural Gas and Propane Lines Correctly!
These are some of the reasons I use a 6 PSIG Pressure Test for Testing Low-Pressure Natural Gas and Low-Pressure Propane Gas lines per International Fuel Gas Code IFGC. I go over what gases to use to pressure test, how high to pressure test, and why what maximum pressure the gauge should be as well as other tips! Supervision is needed by a licensed HVAC Tech before doing this as Experience and Apprenticeship garners Wisdom and Safety.
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[mechanic]

When I added a detached garage I ran a continuous length of 3/4" copper line buried at 24".
I had to flare the ends myself.
I got the gas line permit from building indpection office which outlined exactly what they wanted and how it was to be tested.
They wanted 25# for so many hours.
I ran mine overnight.
PRIOR to the test, I installed a 160# gauge and filled it to 150#.
I then used the soapy water to check all connections.
I found the flared connections leaking.
I cranked them tighter and no bubbles anymore at 150#.
Then I vented the air and installed a 30# gauge and set the test at 25#.
It passed.
I figured if it didn't leak at 150#, it wasn't going to at 25# either.

[maryannmoran-smyth]

There’s always something I learned from the professionals, the part that caught me by surprise is not pressuring down your inlet pressure because it’s too much too fast… anyway keep on rocking

[latourbrian]

Thank you. That was the details I was looking for. I appreciate when people provide the details/reasoning at a high level while referencing the associated codes. Awesome video.

[charlesmorgan]

At 4:56 there there is added wording that says the tested line must not be connected to the meter. If you want to test all the way back to the meter does that mean you need to disconnect house plumbing from the meter and then cap off the house plumbing (similar to capping off the feeder lines close to the gas appliances)?

[Jorbuv]

5:05 How does the city come and test people’s gas lines on houses if they have manual valves in the closed position inside the house?

[Sam-wjkw]

Running my gas line today! Thank you dude!

[dasboototto]

i use a bicycle pump. No danger of me overpressurizing the line.

[billroe]

Our propane company just piped our house and left a 5 lb gauge on with 5 lbs pressure. I noticed next day it had lost about 1 lb and down another lb the following day. I don't believe inspection has happened yet. What is acceptable and safe? Is zero the norm? I don't recall losing any pressure when the underground pipe was tested. I will be speaking to propane company first of the week.

[niltomega]

Thanks bud. It's obvious why your video is the first one on this subject

[Gameboy_Steve]

Awesome video. We are having a class on gas pressure next week for our installers and techs. And to understand inches of water column. Thank you

[GreatSeany]

How can this be done it the system is connected to the gas meter from the utility company? Can you just turn the gas off at the meter? Can the valve on the gas meter handle the PSI?

[Up-hill-Battle]

So if I used a regular psi gauge, chances are it won’t read any pressure at all from the system? I used a compressor to air the line up and all I get is noise from the regulator outside. Like it’s venting excess air outside.

[alonsopty]

Do you leave the line on pressure until the inspector Come out with the new meter?

[philg]

Nobody talks about the fact that the rate of pressure loss by leakage is a function of the volume of the piping being tested. So if you are adding sections of pipe, testing, adding another etc, just the volume of a 3 ft section of pipe will lose pressure a lot faster than a 25 ft section for the very same leak. If you don't understand that, imagine the pipe is 10, 000 miles long starting with 7 psi leaking through a small leak vs a pipe an inch long starting with 7 psi leaking through the same small leak. The 10, 000 mile long pipe would take years for the needle to budge. The standards like IFGC are kind of coarse on this point, saying a volume of less than 10 cu ft needs a minimum of a 10 minutes test. But a 3 ft section of say 3/4 iron is much less than 10 cu ft of pipe volume and the apparent pressure loss from these two volumes over ten minutes for the SAME leak will be much different.

[gonza]

Aside of damaging your check valve with a high psi, I would think that you could potentially cause your joints to leak since the seal is a soft set, could blow off the pipe seal off?

[Klikklikboom]

I put air in my gas line and it held for about an hour. How do release the air out of the gas line before I introduce gas? Does it matter? My bbq stub is capped off at the moment. I tried to let air out of the pressure gauge but it only let about 1-2lb of air out

[browngreen]

Good info. Logically explained. Doing mine tomorrow.

[chrisharris]

A lot easier (for me) to use a gauge that reads ounces on the low side(after 2nd stage regulator), and another that reads Pounds for the high side(1st stage regulator)

[fordx]

Thanks for explaining the temp problem. i kinda suspected that but you confirmed it.