Plumbing and gas jointing compounds WHAT TRAINEE GAS ENGINEERS NEED TO KNOW, how to use PTFE tape. 

Another brilliant video Derek, its good to know the different types of gas jointing compounds you can use which are available, very useful video.. thanks. 😀😀👍👍

Never used Loctite but always willing to try new products to me thanks Derek for this introduction

Top class video, thank you. They say that you are never too old to learn something new, I have got a lot out of this video. Peace be unto you.

Thanks Derek, great video👍

Love your new resolution Del stop waffling and get on with it 🍺🍺🍺🤣🤣

Used PTFE forever! Now I know the gas one is 0.2mm thick, I may use it on those lose radiator connections. Just fixed a leaky one with Loctite 577 I had from 2010, and it has worked despite the plastic lid nozzle getting seized. Liked & subscribed 👍

Another great video, well done.

Thank you for this video! I needed to plug a valve to convert to an induction range and this was very useful. I used the yellow PTFE tape, which funny enough was actually yellow in my case. Gave it 12 wraps and snugged it in.

Great vid, loctite 577 👍🏻

Nice explanation. Well done. I'll look in on your other ones too now. 😀

Nice explanation of the different methods of thread sealing , I’m old school like yourself and have been using paste and hemp for 40 + years now and still believe it’s the best way to seal a threaded joint.... Cheers Derek.....👍

Derek, Thanks for some excellent videos. Re the yellow PTFE it is sometimes sold/ known as just "One Wrap" PTFE

Really good one this, thank you.

Thanks Derek great video 🙏👍😍

The Loctite 55 is totally PTFE free, dunno what the white lubricant on / in it is but not PTFE. I used to do work for Imperial Tobacco or John Players Cigarettes as it once was, they had a blanket ban on PTFE use anywhere in the factory as PTFE gives off toxic fumes if it is burned with a flame! You can imagine if it got into a cigarette can't you...... Loctite 55 was approved therefore, I would imagine Loctite 577 would be fine also. Imperial Tobacco closed down here in Nottingham and is a demolition site at the moment 😳

Great vid Derek just watched 😁👍

thanks for this great job, the pencil fantastic

Nice video Derek. That tip with the pencil was genius. Lol. I will most likely go with the one which is your favourite 👍🏻 Asian Jon. Training.

Loctite 577 can be used on anything up to 3” (gas reg stops you at 2” anyway but can be used on water obvs); but if used on above 1 1/2” you’ll need to put heat on it to get it apart. I spoke to their staff as needed some info when doing a boiler room 👍

Brilliant vid

excellent video

When I use ptfe tape on a parallel threaded fitting I make a cone of the tape. Less on the end more to the back. Starting at the back of the thread I go to the front / end of thread. When I'm done, usually about 15 revolutions, the end of the thread has the least tape applied and the back end of the thread has the most / thickest tape applied. I always run my finger nail around the thread pushing the tape into the thread the full length of the threads so that there is more tape in the thread ,less tape can be pushed back off the thread.

Del the Loctite 577 is an Aerobic Glue, it basically glues the threads together in the absence of oxygen. Amazing stuff, there’s various grades of this Glue & is used depending on the application. Aerobic glue can also be used to glue copper tube & End Feed fittings; simply by using Emery Cloth or both surfaces. Screwfix sell a Liquid PTFE that’s basically Aerobic Glue, a lot cheaper than the Loctite 577. HTH

Liked the pen tip😊

Loctite 577 is a amazing! Alot neater than ptfe! Especially on fancy radiator valves.

Very informative video, i liked you discussed all jointing methods in one video. Can you tell whats the cure times of both jointing compounds and loctite 577 please. Thanks

v2plus is that good to put on olive as well as threads seems good product , also what would you recommend for central heating radiator threads, thx & fab video

Thank you, Nikola Ditsov

Very nice video Derek! In minute 17 you mention something I'm a little bit confused: when doing copper gas pipes with olives, should you or should you Not use PTFE on it? Is gas paste the preferred option? Thanks in advance!

So what would you use for a gas fitting exposed to high temperature like a jet on a gas BBQ?

👍Thank you..

Great video,when using jointing compound on compression fittings do you paste the olive or paste just the copper pipe?

I was brought up on paste and hemp on iron, great joint . Ref your comment on paste and hemp on gas, is it still allowed ? Got told years ago by a corgi inspector that it wasn't :-(

Great video. The plumbers union here does PTFE and pipe dope. Thoughts on that? Overkill or two competing defeating seals?

Great Video. When a trainee engineer has passed the ACS and is preparing for gas safe assessment what advice can you give them, tools etc. For preparation? Thanks

thanks for the video! very informative. Been using loctite 55 for some time now, so much easier that hemp/paste/PTFE. Bought myself some loctite 577 because it looks to be even easier to use... but does anyone know if its ok for potable water? Can't find any references to certify it for potable water other than from NZ. Can't use the stuff for house mains until am sure it can be used for potable water.

Threads like Loctite 55 are cool stuff. But how does their using fit in with BS 6891 7.6.3?

The F&F XL rag is the best 🤣

Great info!! U can make it even better with a new microphone😁

I didn’t know jet lube would actually fully seal a tapered joint for gas and water. Can’t believe it’s trusted since doesn’t set

You succeeded to screw only half of the pipes because the tape at the end of the screw is too much. Sealing is made inside the pipes, therefore be sure to use almost all the filet. Another 2 things: 1. First it is worth rolling the tape in a thread and filling, in one carefully run, clockwise, the inside of the screw. Then wrap the tape over, as a tape, like you did. 2. Before screwing the pipes, LUBRICATE the inside pipe as well as the pipe with tape. This ensures the tape will enter as much as possible undamaged between screws and not get out and agglomerate outside - as it is visible in your video. Loctite 55 thread is better, with the same steps

Had a red tag after the meter was changed here because the pipe dope dried out and had a micro leak. Gas guys came out to fix.

Jet Lube VT should be put inside all the filet of the other pipe too all the way around. To be sure it is everywhere inside

I didn't think you need the 577 into the fitting just on the male ? is this right, that's what Loctite demo guy was doing

I’m a Tennant connecting a gas line for a furnace. My apartments main gas line is 1/2” all I have is 3/8 pvc, my buddy says it’s better to use steel and pvc is not compatible for gas. I don’t see the difference 🙄 My question is the 3/8 is too small to fit the nipple. Is it acceptable using the pipe tape to build up the smaller plastic pipe and thread it on the larger steel gas pipe? It gas checks with no leaks and plastic won’t spark. So far the heater has been phenomenal. If you want a recommendation for a wall heater pm me. Peace.

Can you use hemp on potable water i.e compression fittings? I was told it's a contaminated

Where did you buy your pipe vise

When that locktite ptfe thread/string,came out, I tried it, but didn't like it. I prefer tape, I've noticed when doing dad valves recently. I have to wrap alot more tape on than years ago. Now....20 turns, before 12 or so. I don't count , but I've done that many it's just second nature. And the 20 turns. I still get weaps now and again ffs

Tomkat 👍🏻

👍 Sue Warrington

good video liked - but everybody only cover tapered threads which are easy - unavoidable that there are parallel threads which are not so easy and a combination of the two parallel female and tapered male.

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Surprised the few turns required for gas fittings...

You made that PTFE wrapping awkward try putting your right index finger through the hole and using your thumb on the back of the reel for tension

👍🤓👍

Is it me or has ptfe got thinner over the years? The stuff these days seems crap up to what we used in the 80s. Also I remember been told at college we should wash our hands after using ptfe

I couldn't find any certificates or BS for V-2 Plus.Its only saying its WRAS approved and suitable for Gas but no BS EN 751 or BS 6956 or BS 4371.I Think its not suitable for Gas.

Ray hurrell

Loctite 577, never had any problem at all

Jon-Paul Ward

chris taylor

Umair safdar

The bead of the screwed fittings are for strength not for the Stilsons to chew fitting up 🙄

Polytetrafluoroethylene

Random/Negligent way of wrapping Loctite 55 thread is a big NO. The random wrapping and diagonals are completely wrong. The first wrap should not cross the screw peakss at all and the direction is against the rotation of pipes (the thread is rolled clockwise). Then, if possible, another run, or as many as needed to obtain a little and CONSTANT opposition while rotating. If in the video that negligent wrapping works, it is simply luck. Do not play gambles with gas or water.

Oh hell no. The pipe is tapered. Too many wraps will stretch the fitting.

Don’t put your stilsons on the open end of the fitting, there is a risk of distorting the end.

There is no difference between the two PTFE tapes. We routinely use the “non gas” tape on threaded gas fittings at 300 bar+ offshore. All the PTFE Is sealing the spiral leak path between the root and peak of the thread. PTFE should only be used on tapered threads. It’s use in domestic plumbing is quite limited because almost all are parallel.

Gas non setting

I've just put in a cooker bayonet and I would definitely say it's definitely gas paste all the way for me. I think it's better than ptfe gas tape.