20 mbar or 8" W.C for 2 minutes in the UK

we use a U gauge to test for leaks with the gas pressure. i find it weird they pin locked it normally we A tag shut off and zip tie with warning tag so repair tech can turn back on when repair is made if any.

I was a gas fitter / first responder for the gas utility in STL 35 years and now in my retirement consult for the gas Industry from time to time when things go wrong. I would like to say you did a pretty good job but I would like to go over some procedures that may help. If you’re municipal code requires a 15 pound pressure test , you should always disconnect the piece of equipment and cap the line (isolating the line with the shut off valve is not considered an acceptable practice because we don’t know it’s rating or its likelihood of passing , which would surely ruin the furnace’s gas valve, rated at at a 1/2 pound). Next you should pressure test the gas train with a low pressure ,pressure test using a manometer (you can do this in several ways ,#1 Direct, using a aspirator bulb or lung pressure. #2 reconnect the good piping and low pressure test from the beginning of a line #3 reconnect good line & good shut off valve , install the pressure tap at the sediment trap tee and Low pressure test between the shut off valve and gas valve in the furnace & # 4 once everything is reconnected including the gas meter ,1 more Low pressure, pressure test should be performed with everything in play ( meter, piping & equipment ) , reverifying your work and everything on that piping system. Just like everyone else in the world,gas company employees can make mistakes as well but the main thing is that we learn from them. Hopefully some of this information helps and you all stay safe out there, regards from STL.

Mono test?

@@HVACKnowItAll Sorry…. Spell checked myself Manomer test. He said the line had micro leaks. I tagged it after it held 15 for 15. Not sure what he was going off of.

Yep

Thank you as always!

That's definitely training. 100 ppm isn't even that high tbh. Goodman told me they accept 400 ppm as that's the ANSI standard. Now that's a little high lol.

@@HVACKnowItAll code that the gas company follows is anythin over 100 ppms needs attention, dosent matter what type of equipment it is needs to be under 100 ppms, its up to the contractor to decided to leave it on or not.

Thank you sir!

hi Mark you are right but when we pressure test we do the hole system with the unit valves on to test the valve in the appliance as well.This tells use if the appliance valve is holding as well. fyi we use gas pressure.

Hello Chris, that's how you are supposed to check for valve leak by. In this case there wasn't a leak at all, just leaving the ownership onto others.

@@markshipley1532 he only use soap after the shut off how does he know thats its not pass the valve of the unit.

@@markshipley1532 that is the way we do things as per utility. We don't do repairs, we leave that to repair techs.

As the system pressure and pipe length increases, the pressure test requirements go up.

​@@HVACKnowItAllwhat was needed was a drop test with a manometer between 4" to 6" water column. You can pressure test the line & soap test, it will not show if the leak is in the equipment or appliances. The drop test will, smaller meters like that with a 2 foot drive only requires a 5 minute dial test, but that test can be misleading. In some places, you can't even pass your inspections without a manometer drop test.

Here we test both flow pressure and lockup pressure from the meter with manometer to verify regulator is set to proper pressure and dial test for 5 minutes

​@@chrisp9433I left this on another comment, what you said is exactly right. The pressure & soap test won't show him if the equipment/appliances is leaking. Manometer drop test will, it'll show lockup of service regulators & load. 5 minute dail test is ok, but it'll miss small leaks. There's also ways to test your manometer & your meter set in case there something leaking on your side.

Brother, this is code requirment for this size line. 15psi for 15 min on a 3" gauge.

Maybe

@@HVACKnowItAll the true Enbridge employees are all on big pipeline projects now so it leaves us dealing with subs who I swear majority of the time got zero due diligence or competence.

15 for 15 is minimum code requirement. Where does it say you can't go beyond code?

@@HVACKnowItAll where in the code does it say 15 psig for 30 minutes?

@Venture Ontario think about what you're saying for a minute! If someone is busy tidying or dealing with customer questions and it runs a minute past 15 minutes the test is void? The code is minimum requirement, going above and beyond is not a negative lol

@@HVACKnowItAll lol I’m saying what TSSA says

@@HVACKnowItAll so nothing else can change the pressure in a line over time except for a leak? They teach you this in school. We literally just discussed this in class, and many people had failed because they left their pressure gauge on beyond the specified time in the code book.