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

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Pressure Testing a Gas Line! How to Pressure Test Natural Gas and Propane Lines Correctly! This is 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. These Videos are all part of our Training Series on HVACR Service, Installation, Preventative Maintenance, General Knowledge, and Tips. Please comment and ask for videos that you would like to see in the future! We come out with new videos every few days from my job sites, service calls, and the training shop! I hope you enjoy and find them very beneficial! See you next time at ACSERVICETECH Channel! All of the ACSERVICETECH Playlists- https://www.youtube.com/channel/UCOZR-1IqsAer9wzlvFgb4mA/playlists?view_as=public If you want to support the ACSERVICETECH Channel and receive more HVAC content, check out www.Patreon.com/acservicetech ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. You can enter Amazon through this Affiliate Link found here or in the " Discussion" Channel Page Comments http://amzn.to/2aenwTq Prices are the same as usual. (Link has to be clicked on from an ACSERVICETECH YouTube source and not cut and pasted) Here is a link to the UEI DL389 Multimeter used in the video http://amzn.to/2xAdaJf Here is a link to Refrigerant hoses with valves used in the videos http://amzn.to/2aBumVI Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos http://amzn.to/2aenwTq Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-http://amzn.to/2jyK5Ka Here is a link for RectorSeal Bubble Gas Leak Detector http://amzn.to/2ckWACn Here is a link to the Air Acetylene Torch setup- http://amzn.to/2aQalsb Here is the Link for the 4 Port Yellow Jacket Brute Manifold Gauges and hoses- http://amzn.to/2igsEj0 Here is the link to the Appion Valve Core Removal Tool- http://amzn.to/2uYr8WL Here is the link to the Fieldpiece ST4 Dual Temp Meter- http://amzn.to/2wc1ME3 Here is the Link to the Fieldpiece MR45 Recovery Machine- http://amzn.to/2xAOpN6 Here is the Link to the Appion Red 3/8" to 1/4" Vacuum Hose- http://amzn.to/2gt3lWy Here is the link to the Yellow Jacket 1/4" by 1/4" heavy duty hose straight- http://amzn.to/2umtcod Here is the link to the CPS Vacuum Micron Gauge- http://amzn.to/2v1nM3O Here is a link the Nitrogen Regulator http://amzn.to/2bXdR5f Here is a link to the Nitrogen Flow Meter http://amzn.to/2brvoBg Here is a link for the Supco Magnet Jumpers http://amzn.to/2gS4h6z Here is a link to the Digital Refrigerant Scale used in the video http://amzn.to/2b9oXYl Here is a link to the JB 6 CFM Vacuum Pump http://amzn.to/2nqbvo8 Here is a link to the Supco Vacuum Micron Gauge http://amzn.to/2bH98bO Here is a link to the 1/4" by 1/4" female coupler from Supco - http://amzn.to/2kFrbU9 Here is the link to the Schrader Valve Removal Tool- http://amzn.to/2qCM555 Here is a link the Nitrogen Regulator http://amzn.to/2bXdR5f Here is a link to the Nitrogen Flow Meter http://amzn.to/2brvoBg Here is a link to the General Tools digital Psychrometer http://amzn.to/2cSHsi1 Here is a link to the Amprobe Digital Psychrometer http://amzn.to/2d7cGkW Here is a link to the Fieldpiece SDP2 Digital Psychrometer- http://amzn.to/2nniMVR Here is the UEI Digital Manometer used in the videos http://amzn.to/2c1XkiT Here is the link for the Ratcheting Service Wrench http://amzn.to/2dGV4Nh Here is a link to the Appion G5 Twin Recovery Pump http://amzn.to/2dGSEyr Here is a link to the Malco Sheet metal scribe- http://amzn.to/2qCwu9D Here is a link to the Wiss Right Tin Snips- http://amzn.to/2rGnBvX Here is a link to the Wiss Bulldog snips- http://amzn.to/2rd1Dz5 Here is a link to the Malco 90 Degree Right Hand Vertical Snips- http://amzn.to/2qHHpu4 Here is a link to the Wiss 3 Pack Tin Snips- http://amzn.to/2bHWhWO Here is a link to the Wiss 5 Blade Crimper- http://amzn.to/2bwTlsW Here is a link to the Wiss Hand Seamers- http://amzn.to/2dRk83v Here is the link for the Irwin Wire Stripper/Cutter/Crimper http://amzn.to/2dGTj2V Here is the link to the Stanley 6 in 1 Screwdriver http://amzn.to/2q2SAhe Thanks for your support! I believe this to be the very best price I have found. Please let me know if anyone finds a lower price anywhere! Thank You, ACSERVICETECH
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Text Comments (41)
AC Service Tech LLC (8 months ago)
Tool List- https://www.amazon.com/shop/acservicetech Support- https://www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos- http://amzn.to/2aenwTq Here is a link to Refrigerant hoses with valves used in the videos- http://amzn.to/2aBumVI Here is a link to the UEI DL389 Multimeter used in the videos- http://amzn.to/2av8s3q Here is a link to the Hilmor 4 port Aluminum Manifold Gauge Set- http://amzn.to/2m4QLik Here is a link to the Digital Refrigerant Scale used in the videos- http://amzn.to/2b9oXYl Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
tyler helton (1 month ago)
that's why you use nitrogen; nitrogen doesn't fluctuate with temperature. oxygen fluctuates with temperature and gives inaccurate readings. the code actually specifies that oxygen will not be used.
AC Service Tech LLC (1 month ago)
Yup oxygen cannot be used and yup nitrogen fluctuates less than air, thanks Tyler!
mark.r hvac (1 month ago)
Hi, say I just added a gas line for my fireplace. I have two shutoff valves. One at the fireplace and the other at furnace room where I teed off. So I would just shut off the two valves and ONLY pressure test the new line correct? Or do I have to do the whole house? Thank you.
AC Service Tech LLC (1 month ago)
Yes, that is what it states in the IFGC 2018 and then you leak test with non corrosive bubble leak detector afterward at the connection points to the appliance and to the main. Have you seen this video on the inlet gas pressure and making sure to not pressure test with an appliance connected, thanks- https://youtu.be/3pi6uGPPjCo
mark.r hvac (1 month ago)
thank you for your reply. so on the appliance side i would just cap the new line off (without connecting to appliance). then on the other end of the new line in the furnace room i would just connect my test dial (without connecting to the main) and put in pressure. so basically, i am just adding pressure to the new line ONLY with nothing connecting to it (not appliance or main gas line). is this correct? thank you.
AC Service Tech LLC (1 month ago)
You can't valve off and then pressure test. The line cannot be connected to the appliance but just near it. Then add the pressure test to the other end of the branch. The whole house does not need to be tested but just the new branch. After the pressure test holds and inspection, release the pressure and connect the branch to the main and the appliance, thanks
Jason Baumann (1 month ago)
How long should the pressure stay in the line? I had my contractor pressurize the line but a week later its at zero, the inspector takes forever to come out where I live
AC Service Tech LLC (1 month ago)
I just picked up my pressure test from a job that I left pressure in for two weeks. The pressure was the same. There may be some increase when the outdoor temp increases or a pressure decrease when the outdoor temp decreases but overall it will remain unless there is a leak. Your line has a leak in it, thanks!
BIG SHAQ (2 months ago)
Could you also use a bicycle pump instead of a compressor?
AC Service Tech LLC (2 months ago)
Absolutely, it just takes a little time depending on the size of the line, that's all, thanks
Joel Schmit (7 months ago)
Could you please explain why you cannot use a manual valve in the closed position at the end of the line? Thanks!
AC Service Tech LLC (7 months ago)
They leak and if you read on the side, they only are rated for holding back 1/2 psi, thanks
Santos Marquez (8 months ago)
Awesome video find. I'm doing, or will be, a leak test of my own. Great coverage on your end. Thanks,
Nexalian Gamer (9 months ago)
Why does he show us this video if he says to not try this at home?
BIG SHAQ (2 months ago)
AC Service Tech LLC  Like me! You are helping me so much. I just get thrown to the wolves so I'm learning everything on my own.
AC Service Tech LLC (9 months ago)
I put these out for younger HVACR techs and for continuing ed for those techs with experience, thanks
Bret Askeland (1 year ago)
Can I go from 1/2” gas pipe to 3/4” pipe after the gas manifold to run it outside and not have a noticeable drop in pressure or flow?
AC Service Tech LLC (1 year ago)
It all depends on length and turns. I would only run it in the same or a smaller size after a main trunk or manifold but that is only if my manifold would support the extra btu's. Here is a video on gas line sizing, thanks- https://youtu.be/MY31HlLdn4M
forty two (1 year ago)
Man! Do I love to see the pressure go up! But 6 psi? Wow! UPC used to be 15 psi. Then they lowered it to 10 psi.
AC Service Tech LLC (1 year ago)
Hey Richard, that is for low pressure 5-8"wc nat gas and 11-13"wc Lp on a 30Lb pressure test and follows the 3 guidelines spelled out in IFGC 2015, thanks
Neil Williams (1 year ago)
Thank you for your informative video. What do you do when you "check everything" and you still have a leak, small or large? How can I find a gas leak if it is underground(just dirt and grass) Thanks again
AC Service Tech LLC (1 year ago)
If you really can't find it then you should take a section off and just test that section only. If it is underground, it souds like a replacement, thanks!
jimmy ung (1 year ago)
Thank you, I learn a lot from you.
AC Service Tech LLC (1 year ago)
Thanks jimmy ung!
Rod Paletta (1 year ago)
finally someone that knows what they are talking about...it is scary these guys using compressors and putting 30-50 psi into the system.
forty two (1 year ago)
And why not put 50 psi in a gas line? Because the velocity of the air rushing out a leak can carry debris into the hole, sealing it temporarily. 2 years later, the now rusted chip has fallen away and , voila"! Boom.
AC Service Tech LLC (1 year ago)
Ha ha thank you Rod Paletta! There is lot of misinformation out there.
Wayne Miles (2 years ago)
Can a home owner or hvac contractor secure the main gas shut off valve at the meter if minor repairs are needed inside the house. All repairs will be checked for leaks. Thanks.
AC Service Tech LLC (2 years ago)
Yes at the customer side which is usually the right, not the stub side from the ground. Thanks!
jimbola77 (2 years ago)
super video can I use a uei manometer electronic? thank you for sharing partner!!!!1
Tony Rodriguez (1 year ago)
If you use an electric model please be sure that it is properly calibrated prior to use.
AC Service Tech LLC (2 years ago)
You can use the UEI Electronic Manometer for checking the actual nat gas or propane pressure coming into the appliance but you would use a gauge that is tightened onto the actual gas line for pressure testing when the gas line is not attached to any incoming regulators, meter, or supplying appliances. All of the branch ends would be capped during a pressure test to 6psig. Glad you enjoyed it!
rinor pasjaqa (2 years ago)
Great video...Can you please make a video about what are the most common parts that a technician should keep in a truck!
AC Service Tech LLC (2 years ago)
That is a good video idea. Thank you and glad you enjoyed the video.
Ron White (2 years ago)
thank you for your video.
AC Service Tech LLC (2 years ago)
Glad to help!
Straycurrent (2 years ago)
Excellent training -- thanks for the education.
AC Service Tech LLC (2 years ago)
Thank you very much!
Octavio Delgado (2 years ago)
Thanks for sharing. Very helpful.
AC Service Tech LLC (2 years ago)
Great to hear, thank you!

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