Great series on gas pressures. Really good explanations and most importantly everything makes sense. *Never take a test nipple out when the fire is running* . Hopefully I will never forget that thanks to you. Brilliant. Thanks Derek. 👍🏻 Asian Jon. Training.

As allways absolute amazing mate ✌️👍😊well explained !never seen a better trainer !!you have the German in you 😘Connor

Many thanks for the video due to the excellent training at tomkat I fully understand all about standing and operating and burner pressures

It’s amazing video briefing about how to check burner and operative pressure 👍

Loving the vids. Great to refresh the mind after years of forgetting stuff lol

Amazing video ,thanks Derek.

Perfect explanation. Thanks Derek 👍😀

Great Video, brilliantly explain everythings, thanks Derek. ‘Bilal M’ trainee Tomkat.

Thanks Derek, great videos. A couple of points, which you may’ve mentioned & I missed. On checking for operating pressures at a boiler, the other appliances attached to the same carcass/pipework should be On, cooker with 3 rings burning etc. You still are only permitted up to 1Mbar difference between the Meter & appliance. Also, and this is only a daft wee point; in the Trade, the test points on a Gas Valves are referred to as P1(inlet pressure) & P2(Burner pressure). I hope you find this constructive👍

Good video. Cleared up a bit of confusion for me !!!

Cracking explanation as always on the bread and butter stuff - easily overlooked by many breakdown engineers when reaching for the multimeter :)

Thanks Derek excellent video mate

I feel like I'm learning from scratch.thanks

Why did you adjust the valve on the BOP? You should test it at max then but it back to the 8,8. This is for the Pottertan King Fisher Floor Standing

Great video Derek thank you for your time and effor👍

Thank you for all your videos

Thanks for the video, great help!

Very useful information, thank you👍

Thanks for vids. Was just wondering tho if you could add scenarios where the operating pressures would not be acceptable. So say at the appliance it was 18mb operating (ok as per MIs) and 18.5mb pressure and at the meter would this be undersized pipework? And what if the cooker and fire was operating must the operating pressure at the meter all way be between 19 and 22 mb? And if not would all the pipework at the property have to be increased if below 19mb at the meter?

Thanks a lot darek very useful vedeo

Great vids and thank you so much for everything sir😊

Great video again Thanks

Excellent tutorial mate👍

Thank you

Great video cheers pal.

Ray Hurrell very interesting vid enjoyed

Very helpful video thanks. What’s static pressure please? Also what’s dynamic pressure?

I bought a test adaptor to test the injector burners on my Gas cooker. i tested all four injectors. The standing pressures were fine 24.5 mb at the meter and around 24.2 mb at the injector test adaptors The operating pressure When i lit the two medium size burners together. i was getting a pressure of around 22mb at the Gas meter, and 22mb at the large and small burners. which was okay. The problem was when i lit the Large and the small burners together to test the two medium burners. The pressure started at 24mb and kept rising till it got to 31.2 mb at that point i had to stop the test. This happened with both the medium sized burners. Any suggestions as to why this would happen.

Very well explained thank you.

Thanks for great videos .

Nice one Derek my Acs due soon 👍

Amazing explanations really enjoyed these last few videos. Will you be posting anything on flues, how they are installed and correctly sealed etc? Please keep up the good work Derek. Thank you.

You are the best ❤️💐💐✌️👍👍👍

Excellent video Derek. What about a video about when gas pressures don’t meet the 1mb difference or to MI’s

Hi Derek. The old style floor standing boiler. It looked like the boiler burner pressure was at the lowest.. ... wouldn't it be better to adjust the burner pressure to be mid range ?? Well done on the videos. Done as a "this is the way it is " down to earth . Hope to hear from you. Rgds Don.

Thanks for all your video, could you please let me know if 29 mbar if ok for standing pressure, and what should we do if working pressure is 28 m bar. Thanks

what about where you get an old 22mm run under a drive then increase it to 28mm to get volume you get gas valve bounce right till it stabalizes?(bosch guy complained i hope they went back to drawing board)(the old way of doing stuff) yours is a short run as you know that's not how it works in real life. again ty for upload. have you ever had a gas soldered join leak after you tested it? with a customer present. next day customer reports smell of gas outside. test that passed the previous day failed so massivley that i thought its a mechanical join losened. new 28mm brass union off the meter and just below on the 2nd elbow there was a leak within the meter box. im meticulous in watching how solder runs into my joints. could my 28mm gas joint have leaked the next day without tampering. should i be testing with air. at a high pressure? clean reamered for gas flow 28mm gas that i had propane on because the wind was taking heat from the joint there is a history behind this house where somone wanted to buy it as is. the current ownenrs decidided to upgreade. how do i protect myself? i video my gas tests what i'm trying to say is do i get my gas safe inspector involved ?

Thanks Derek good video. Got my acs exams next month, was debating on whether or not to do them as I retire the end of next year be 66 😃 but you have convinced me to carry. Regards Robbie

Thank you, Nikola Ditsov

Thank ur sir lm also working as natural gas technician in uae 🇦🇪

Is the 1mbar difference allowence from operating pressure at the meter and operating pressure at the appliance. Or is it standing pressure at the meter and standing pressure at the appliance. Or is it both?

Well explained

hi, I am gas engineer but I always like your tutorials on gas. kindly drop link where to get digital U GUAGE PLS. THANKS

Hi Tom just a quick question do we have to turn pilot off prior to opening the p2 for bp test even though there is no gas coming out if boiler is not turned on? Just thinking yes should be off incase the gas valve is faulty.

👍 Sue Warrington

Excellent training as always Derek. Is there a regulation that states if gas meter outlet is disconnected any open ends as far as practicable should also be called. Be it say temporary redundant I e. Removing gas fire

Hi there love what your doing helps me loads, Can I please ask u a question so u can decide an argument? I’m a gas student doing my portfolio , and my mentor tells me that you don’t need to do operating pressure at the appliance because if there’s a problem with pipe sizing that gas rating would show this, or the FGA would show this . We’ve been doing lgsc’s and he doesn’t even take the cover off the boilers he checks, fault code lockout , he gas rates appliance , and does flue gas analysis. He had a go at me for saying we should be checking OP at appliance using the inlet on gas valve as I was taught. He says that you lose too much pressure over the pipe work inside boiler and that some boilers say inlet pressure as low as 15mbar is fine in MI’s. He says you can’t take OP at boiler unless it has test nipple at iso valve for gas. Which I say is wrong and you test OP at the inlet on gas valve to check correct pipe sizing and drop is no less than 1 mb. Is he right?

👍

When taking an op pressure at appliance such as boiler do the other gas appliances need to be on ie 3 largest hobs and a fire

When filling out a gas safe certificate it says operating pressure in mbar. Is this at the meter or at the appliance

Hi Derek Good video, just a quick question is it correct practice working pressure at the meter if you have let’s say 2 appliances at full rate like 1 boiler and 3 rings on a hob, in the same time have a digital manometer at inlet pressure at the boiler So idea is if working pressure to carry on with 2 appliances at the same time, or is not a requirement Thanks

what does P.OUT mean on a gas valve? Is this where the appliance Operating Pressure (burner pressure) is taken?

Hi Derek Thank you for the videos, helps alot Can you please send a link where you have adjusted the burner pressure on atmospheric boiler gas valve I have seen it but can't find it now Many thanks

On the gas fire data plate, it says cold setting pressure. what does this mean?

Can you do a video on WAU, Multipoint WH and Sink WH?

👍👍

Ray Hurrell

Can you please make a video of full boiler service from A to Z. Thank you.

tomkat👍

Jon-Paul Ward

chris taylor

Mike Tinsley

✅👍🏻

Tomkat👍🏻

steve ward

Marcin Masalski

👍🤓👍

I say gas rate wouldn’t show pipe sizing problem because the problem would only occur when other appliances are on , I keep getting shot down by him cos I was taught OP is very important

Mike Fahy

Winner

Please share your email id i have a question, i want to share the same for clarification.

Thank you