Well done Derek, I have been in the gas industry, in a technical capacity for 55 years and recognise a genuine professional.

10mintes or more, it doesn't matter, your teaching is perfect ,if the subject needs more than 10 minutes, fine it's educational. Thanks alot

Hi Derek, have my 1st re-assessment in October so am just using your videos to jog my memory, but have found them to be really straightforward, where things need to be explained it’s done simply - so as not to end up feeling blinded by science ( regs or bs….) - thank you. Also considering they are freely available to all and you ask for and respond to comments why individuals find the need to be critical or negative says more about them than you. Anyway thanks again.

Thanks so much for this Derek, got my ACS coming up soon and these revision videos will be really handy 🙏👍

Well done, please don't worry much about the people complaining, this is about Gas and its a dangerous thing. Please take your time and explain properly for our safety 🙏

haha appreciate the shorter length without the waffle. look forward to this series, good idea. cheers mate

Solid grounding of the basics, sets the foundations for everything else 🔥 great vid Derek

Thanks Derek I am currently training to be a Gas engineer through Access Training and this is so helpful and actually better than the webinars I attend. feels easier to follow because its such a short period of time.

These videos are like im back in the classroom 👌🏻

Great .. keep them coming .. you helped me pass all my exams just before Christmas .. just waiting for my gas safe number now.

thanks again legend. you're really helping out the new engineers do things the right way. we need more people like you who are genuinely helpful and not just talking nonsense just to sell products! Many thanks!

Brilliant video as usual, very good.

I love dereks videos always easy to understand nice and clear well explained thank you derek your a star.

That was one of the best if not the best explanation

Excellent video Derek, well explained in under 10 minutes. 👍👍😀😁

As always, instructive, informative and just great; thanks for the time and effort. Much appreciated

Brilliant video Derek, that exactly what we learned in last week. 👍👍👍 Billy trainee Tomkat.

Thanks it was just lovely

This guy is amazing ! So much useful information for newbies ! Thank you !

Excellent video. Full of information. Thanks Derek 👍😃

I like the longer version you go in to more detail. But still great Thanks mate

Brilliant video again Derek. 🙂

Good video as usual.. but you have to connect continuity bonds when testing the ecv for let by with LDF..

Good video, I will get my apprentice to watch it. Much appreciated

I don't mind when you waffle haha. At least you're not a boring, monotone teacher. I really like your videos and they are very educational 👍🏻

Great vid thanks Derek 👍

It’s amazing full of knowledge Video .Thanks Derek

The penny is dropping with the Tightness test now. Great Vid

Thank you my teacher😊

Thanks Derek , enjoyed to listen & watch

It’s amazing video full Of knowledge Thanks Derek

Nice video Derek. Well explained 👍🏻. The timing on which I watched this video was pretty good. ACS revision! By the way, I don’t think you waffle at all mate. Keep up the good work. Loving it. Asian Jon. Training.

Thank you for the video..

Great video Derek, This is fantastic for my revision, can you do a 10min video on flue and chimney

Tanx for the upload excellent information 👍

Thanks Derek, another informative video👍👍👍

Brilliant mate. Clearly explained!

Excellent explanation 👌

Cheers Derek

brilliant 👏

Thanks derek.

Definitely starting to get it! Thanks Derek!

Thomas Bradwell Thanks Derek

Nice one Derick seems strange you not waffling. Like the new 10 min format and glad you got rid of the background music, much clearer without it. Thanks Rick Kirk

Thanks Derek great video 🙏👍🙏👍

Great video helps a lot👍

First class presentation

Thanks, great vid. Waffle or no waffle.👏💪🛠

Thanks Derek, Ion Vitiu 👍

Nice one Derek , any length of video is fine by me....👍

Thanks for another brilliant video

Thank you, Nikola Ditsov

Another useful and interesting video by tom cat gas training .well done derek.

Great video,thanks derek..

Top video. Cheers Derek

Thank you So drop can not be on pipe work or meter Then if we have drop permissible System is pass but we need to actually isolate the appliances and make sure drop was on them not on pipe work or meter So In reality Tightness test does not really says if drop is on meter or appliances or pipe work Is for whole system So if meter is leaking or pipe work Then we only find out by isolating the appliances But again. Even when we do that Then we need to do tightness test stage by stage of installation by isolating the part of system and eventually use electronic gas leak detector. To really find out where the leak is Weather on pipe work or meter And that’s also proses of finding leak and if is meter then to report it and get it replaced or fix the section of pipe work which is leaking

awesome video yet again

Any chance on a vid covering appliance connection test as well.

Good video BTW

Thanks

Jason-Dean Moran-Campbell

Please can you us a video about boiler fault finding because you are excellent teacher

Top video again, thanks .

Top presentation!

thanks

Great video

Hi pal, great video! Teach commercial too? If so, could you do a video on commercial tightness testing?

i can smell gas outside when the boiler is trying to fire( purge) obvously its passing gas valve. now do you let that go? even if its within regs?

Thanks Derek

Hi , if you are at an old installation let's say , you have a drop within tolerance , then you isolate all appliances , who's to say that an isolation valve could not be passing on one or all the appliances enough to make you think there is a drop in the installation pipework ? Some stuff I feel gets confusing ? Can you clarify how you would proceed , do we need to go that far ?

great !! another good one ...

Great video. Short and to the point. The nightmare question..... what classifies as an existing installation, not new. Always a question I get asked. Honestly, I don’t know the definitive answer. 🤷🏻

Your the man long video or short

Great video, you mentioned let by test less than 0.25 on a U gauge, but the gauge readable movement (GRM) is 0.5?

Very informative

Top man

Hi , doing my Acs atm But I don’t understand clear what happened if a let by test fail . What you need to do if you can’t fix it !!!?? Need to cap the ECV valve off and contact the gas emergency number ? Thanks

So are you saying if there is appliances connected , we are allowed drop , then what about if there is appliances connected but I turn off the appliances gas valve and there is drop on the pipe work but no smell but still same old installation?

👍 Derek

Very good

Quality vid

Good video much prefer the shorter videos 👍🏻

In the last scenario, who here would feel comfortable with an 8mb drop? I know I wouldn’t!

👍Sue Warrington

great

The problem with this table and the IGEM/UP/1B, there is not actually a requirement for us to prove the leak is on appliances or pipework, according to the IGEM and Gas Safe. We’ve been having this debate for years which has resulted in a meeting with IGEM a couple of months ago to clear it up. The answer is there simply is no logic behind the fact that you can have a leak on existing pipework with an appliance connected to it unfortunately. It all harks back to a time long ago when all this research on leak rates was undertaken. The new version of the UP/1B has quite rightly proposed to remove this table, but we are just waiting to see if this will stick after the ‘industry’ review?

Are you allowed to disconnect the anaconda from the ECV if a letby fails to spray the ball with ldf

Hi Derek I see you're using cura ldf. I was told by my inspector on my gas safe inspection that you can only use rocol. I asked him why do they sell the other brands and he says he doesn't know and doesn't care.

Landlord gas safety certificate please.

Hi, great video. I just want to query the permissible drop process as this is different to what I was taught and what gas safe technical have told me. I was told it has passed a tightness test if it falls in the permissible drop criteria for that installation and further investigation is not required ie attempting to trace a leak. I was told that an isolated appliance is still a connected appliance so the permissible drop would still be allowed with appliances isolated and only if you disconnected all appliances and tested would you not be allowed a permissible drop. I'm not trying to be smart here, I'm genuinely trying to clarify in my own mind, the best way of doing it as I can see the point of both sides here. Especially if a landlord complains you have capped his tenant off and have quoted him for a very expensive repipe then another engineer says you're wrong and turns it back on. Any info appreciated

Hi Derek, thank you for these!! Just wondering, are we expected to know pipe and drop size of by heart for the ACS exam? Cheers, Michelle

This is very helpful and the 10 minute videos are great Can you do more for us trainees Controles would be a good one but will be a few of them I guess of you do them all Medium pressure meters

Dereck , are smart meters considered same as ultrasonic e6 meters in terms of permissable drop of 8bmr

👍Arek Winski

Please do one in less then 10 minutes about ventilation.

👍😊

Do you go thru faults in a gas meter nd sensors on a boiler which will be in the exam I heard

👍 derek

carrying out a tightness test...pressure dropping during let-by test, is there a min/max permissible?

Davison: Gas trainee