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.
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?
I didn’t adjust anything on the open flued boiler. I don’t understand why you are saying I should test it at max and then reduce it back you don’t do that on a range rated boiler you test to see what it was set at when commissioned. This was set at low so you check burner pressure gas rate and inlet pressure to see if they all are correct
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
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?
Gas safe position on this, as we have had many of these is.... eg a boiler, if the "appliance" WP gas pressure is below MI, then it is at risk. However if the boiler meets all combustion specifications, ie gas rate, Ratio, C02 etc, then it can be left on, if the customer wishes ( ie does not agree to turn off), as it is not ID.
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 ?
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.
The different settings low mid high are so the boiler can be ranged rated for the kw required for the property so it depends on the kw you need wether or not you set it to mid
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.
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.
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.
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
The regs say no open ends on a live gas supply if you disconnect the anaconda and cap off the ECV then the gas is isolated so turning on the gas at the ECV won’t live the gas supply. Some people might say what if someone reconnected the supply then my answer would be when reconnecting you must test the gas. Hope that answers your question
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
Thank you for your quick response But I am taking about burner pressure set up on atmospheric combi boiler, like the one towards the end of this video. Not the multi functional valve... Please
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?
Some manufacturers give you a test point at the inlet valve which you can’t have more than 1mbr drop others tell you the lowest pressure at the gas valve. If the safe operation of another appliance is affected by another appliance then it’s ID but if it doesn’t it’s ncs
No because if the gas pipe is sized correctly it shouldn’t make a difference but if the gas pipe is undersized then you need to see if the appliance is affecting the safe operation of the other appliances but turning them on at the same time.
@@tomkatgastraining sorry to disagree Derek, but you can only establish or check if the pipework is undersized by having all appliances On. Or indeed if the carcass pipework is blocked somewhere. On any Gas Safe inspection or Housing Association audit they always insist on this procedure for carcass pressure drop test.
@@TheDickPuller no you are wrong if you were correct why do we not use the full kw of the appliances when we size a gas meter also when we pipe size now we only get the less than one Mbr drop to each appliance. I agree it’s good practice but not what regs say
@@tomkatgastraining thanks Derek, as I said, it’s the procedure recently wanted by a Gas Safe Inspector & on Gas Audits. I will double check with our local GS Inspector, regarding procedure & Regs. Thanks for taking the time to do the videos👍
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
@@tomkatgastraining Happy new year Derek !!! Will be watching all your videos right up to when I do my reassessment, been finding them really helpful. All the best. Regards robbie
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
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
You are correct it is and as you say it’s the op that shows incorrect pipe sizing not gas rate because like you say you can only have that appliance on to gas rate. My advice would be bite your lip and get the portfolio done ASAP and get the hell out of there 👍🏻
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.
Very nicely explained awesome video and fantastic channel you have new sub 👌👍
Many thanks for the video due to the excellent training at tomkat I fully understand all about standing and operating and burner pressures
As allways absolute amazing mate ✌️👍😊well explained !never seen a better trainer !!you have the German in you 😘Connor
Loving the vids. Great to refresh the mind after years of forgetting stuff lol
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?
It’s amazing video briefing about how to check burner and operative pressure 👍
Amazing video ,thanks Derek.
good job
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
I didn’t adjust anything on the open flued boiler. I don’t understand why you are saying I should test it at max and then reduce it back you don’t do that on a range rated boiler you test to see what it was set at when commissioned. This was set at low so you check burner pressure gas rate and inlet pressure to see if they all are correct
Cracking explanation as always on the bread and butter stuff - easily overlooked by many breakdown engineers when reaching for the multimeter :)
Good video. Cleared up a bit of confusion for me !!!
Great Video, brilliantly explain everythings, thanks Derek. ‘Bilal M’ trainee Tomkat.
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
Stand pressure at 29 mbrs and workingof 28 mbrs I would be getting Cadent out to check the regulator
Perfect explanation. Thanks Derek 👍😀
Very helpful video thanks.
What’s static pressure please?
Also what’s dynamic pressure?
Thanks Derek excellent video mate
Thanks for the video, great help!
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?
Thank you for all your videos
Great video Derek thank you for your time and effor👍
Excellent video Derek.
What about a video about when gas pressures don’t meet the 1mb difference or to MI’s
Gas safe position on this, as we have had many of these is.... eg a boiler, if the "appliance" WP gas pressure is below MI, then it is at risk. However if the boiler meets all combustion specifications, ie gas rate, Ratio, C02 etc, then it can be left on, if the customer wishes ( ie does not agree to turn off), as it is not ID.
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 ?
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.
The different settings low mid high are so the boiler can be ranged rated for the kw required for the property so it depends on the kw you need wether or not you set it to mid
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.
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.
In production 👍🏻
Excellent tutorial mate👍
Great vids and thank you so much for everything sir😊
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.
Very useful information, thank you👍
Great video again Thanks
Thanks for great videos .
Nice one Derek my Acs due soon 👍
Thanks a lot darek very useful vedeo
I feel like I'm learning from scratch.thanks
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
The regs say no open ends on a live gas supply if you disconnect the anaconda and cap off the ECV then the gas is isolated so turning on the gas at the ECV won’t live the gas supply. Some people might say what if someone reconnected the supply then my answer would be when reconnecting you must test the gas. Hope that answers your question
hi,
I am gas engineer but I always like your tutorials on gas. kindly drop link where to get digital U GUAGE PLS.
THANKS
Great video cheers pal.
Ray Hurrell very interesting vid enjoyed
Very well explained thank you.
Can you do a video on WAU, Multipoint WH and Sink WH?
On the to do list 👍🏻
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
th-cam.com/video/yFdhHtu8GrQ/w-d-xo.html
👍🏻
Thank you for your quick response
But I am taking about burner pressure set up on atmospheric combi boiler, like the one towards the end of this video. Not the multi functional valve... Please
@@mahanrai356 I haven’t done a video on that type of appliances sorry
Not a problem
I thought you had
Thank you anyway, your videos helps alot
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?
Some manufacturers give you a test point at the inlet valve which you can’t have more than 1mbr drop others tell you the lowest pressure at the gas valve. If the safe operation of another appliance is affected by another appliance then it’s ID but if it doesn’t it’s ncs
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
No because if the gas pipe is sized correctly it shouldn’t make a difference but if the gas pipe is undersized then you need to see if the appliance is affecting the safe operation of the other appliances but turning them on at the same time.
@@tomkatgastraining sorry to disagree Derek, but you can only establish or check if the pipework is undersized by having all appliances On.
Or indeed if the carcass pipework is blocked somewhere. On any Gas Safe inspection or Housing Association audit they always insist on this procedure for carcass pressure drop test.
@@TheDickPuller no you are wrong if you were correct why do we not use the full kw of the appliances when we size a gas meter also when we pipe size now we only get the less than one Mbr drop to each appliance. I agree it’s good practice but not what regs say
@@tomkatgastraining thanks Derek, as I said, it’s the procedure recently wanted by a Gas Safe Inspector & on Gas Audits.
I will double check with our local GS Inspector, regarding procedure & Regs. Thanks for taking the time to do the videos👍
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
Good luck with your ACS let me know how you get on. Merry Xmas and a happy new year 👍🏻
@@tomkatgastraining Happy new year Derek !!! Will be watching all your videos right up to when I do my reassessment, been finding them really helpful. All the best.
Regards robbie
Thank you
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
You have a maximum and maximum m3 working now when checking working pressure at the meter 3.5 max and 0.5 min
@@tomkatgastraining Sorry can you give more details on this one.
Thanks
You are the best ❤️💐💐✌️👍👍👍
When filling out a gas safe certificate it says operating pressure in mbar. Is this at the meter or at the appliance
Appliance
what does P.OUT mean on a gas valve? Is this where the appliance Operating Pressure (burner pressure) is taken?
P out meant pressure out . If the boiler is non condensing then yes you would do burner pressure here
@@tomkatgastraining thank you. much appreciated
On the gas fire data plate, it says cold setting pressure. what does this mean?
When you have just turned it on
Can you please make a video of full boiler service from A to Z.
Thank you.
There are lots of different boilers that require lots of different ways of serving so it’s hard to do a general boiler service
@@tomkatgastraining Ok
If you want the AtoZ how the penguins do it, get your analyser probe stick it in and move onto the remaining 10 boilers for the day 😂
Well explained
Thank ur sir lm also working as natural gas technician in uae 🇦🇪
Thank you, Nikola Ditsov
👍 Sue Warrington
👍👍
👍
Ray Hurrell
Tomkat👍🏻
✅👍🏻
tomkat👍
👍🤓👍
How you feeling mate ? Hope all is well 🙏
That TPI looks handy 👍
Jon-Paul Ward
Marcin Masalski
chris taylor
steve ward
Mike Tinsley
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
You are correct it is and as you say it’s the op that shows incorrect pipe sizing not gas rate because like you say you can only have that appliance on to gas rate. My advice would be bite your lip and get the portfolio done ASAP and get the hell out of there 👍🏻
Mike Fahy
Winner
So what could be the problem if the operating pressure at the meter goes down to 16mbr and the operating pressure at the boiler is 14mbr while on DHW?
Please share your email id i have a question, i want to share the same for clarification.
Thank you