You can tell when a person takes pride in the work they do and watching your channel it's clear you are one of them... keep up the great work. ~ Take care, Mark

I watched numerous other videos and nothing worked. Eventually stumbled upon yourself and you've saved my bacon. Thank you!

My cousin that is a plumbing engineer walked me through how to do this and it resolved my problem but afterwards I wanted to better understand the system and process and your video ticked all the boxes, thank you so much.

Thank you so much for this video, I followed your instructions and my heating/boiler is working again, I had levers as opposed to screws which made it easier.

Thanks for this video - I’ve got a system like this and it’d dropped pressure right down - your video really helped sort it out! House is nice and warm again!

Thank you so much! This helped me gain the confidence to go messing with my pressure and all that jazz in a foreign country! A small victory!

Thank you - that was really helpful. Got my system back up and running which is handy during the Covid 19 lockdown!

This is exactly what I was needing thanks. I was totally confused as to why I couldn't find a pressure gauge or valve downstairs on the boiler for topping up system and knew I didn't have a water tank in the loft. Wanted to know everything was located before i started bleeding and balancing system. Perfect YT's great ha

Cheers roger had a few issues around boiler pressure. This has sorted it mate 👍

Thanks for the video, my sentral heating system now has the correct pressure :-)

I want to personally thank you for helping. I finally found that feeding valve. Ours was disconnected. And when you said you can leave it disconnected I was like it makes sense. I have to connect it and feed it manually like you shown and then disconnect it. So thank you. We are staying nice and warm now. :)

Liking these videos you’ve been putting out recently

Very clear simple instructions to follow. Thank you Roger. May need to look at a video on the expansion tank in a few weeks time if the pressure does not remain stable!

Great Video! Thanks for the tips! You took me out of a big trouble with the winter coming and the wife complaining! ;) Best regards from Austria! Keep on with the great work!

This sorted my heating problem out straight away 👍

First trying to bleed the radiator, no hiss sound, no water coming out, no luck. The upper part of it was still lukewarm. Then I watch this video... Mama mia! Problem solved instantly, the bar went right up to 1 from 0 (then I realised that the arm that should be moving is the black one not the red one...). Back to the radiator and did the same bleeding job. This time, a loud hiss sound followed by water dripping out, and the upper part of the radiator is piping hot in the matter of seconds. Thank Jesus, Mary and Joseph!

Amazing video. Very easy to follow and saved us a lot of time and money 👏🏻👏🏻👏🏻

Thank you very very much. This was problem with cold radijator (half cold) by me, on the 1st floor. Because, I removed one radiator on the -1 level(garage level). And water pressure wasn't enough to push water again up(on the 1st floor). So, I did everything like on this video, and everything is OK now. Thank you again.

Excellent informative video......I followed the advice here and now my CH system is working perfectly 🙂

Thanks a lot ! You saved me an expensive call to emergency heating guy !

Thanks for the information. Very useful!!

Thank you, very clear - sorted out my problem.🙂

found the video very informative and useful

Nice one thank you Rich :)

Thanks you man greatly appreciated solved months old problem

Top notch was able to bleed my system after a stove install. Many thanks

🙏🏽❤️💐Thank You, It was so helpful.

Thanks Roger. Really helpful this video.

OMG thank you thank you thank you! Heating now working -6 later tonight xxxx👍

Thank you for the video.

Brilliant help Ty

Roger, did you ever get around to making that video about recharging the expansion tank (that red thingy)? I need to do that as my system is constantly losing all pressure within about 4 hours of the heating system going off. Cheers

That was really helpful.... Thank You ❤❤❤

Excellent!

Thank you for this! Just stopped my mother in law screaming. Saved us a fortune as it is -7 today

Guide to the pressure vessel would be great 👍

Completely sorted my pressure issues after the refitting my radiator. Especially showing that there was 2 valves to open, as I was turning one a towel was hiding the other. Cheers for the vid, you've saved me 👍

Could really do with a guy of Your skills in My area. Great video

I had massive problems with three systems, all of which which were completely new - pipework, rads, and boilers. Radsat the highest points needed venting every week, and topping up every few months. No leaks that I could find. Drove me nuts. On my present system I have auto vents at the highest points, and, unlike the previous systems, motorized valves on both flow and returns. I never get air, and only top up by a tiny amount every year or more. One plumber told me that air can be sucked in through the radiator vents, seems unlikely to me. Problems in the past remain a mystery - crazy.

Hi Roger, I moved to a new house 6 months ago and decided to get a plumber to check the plumbing. There is an unvented cylinder in a cupboard on the upstairs landing and also a white expansion vessel. The plumber told me that it should also have a red or grey expansion vessel because the white is for hot water and a red or grey for the heating. It’s been working ok apart from living/dinning room radiators which are very slow to warm up and don’t get as hot as the other 7 radiators. So confused and would appreciate any advice.

Thanks for the video, very well explained. 🙏👍

Thanks for this. Can you cover the same subject for normal boilers with a hot water tank please?

Good vids 👍

Very helpful video

Thank you very much it worked for me.

Cheers mate, worked a charm

Hi Roger Do you know anything about water accumalator tanks that can be used to boost the mains pressure in a domestic property?? If so are able to do a video on how they work, and how effective they really are please?? Great channel BTW keep up the good work!

Thank you!

Have yourself a subscribe and a like young man. Bled my rads yesterday and I have no pressure. Screw you Craig off of big brother. You didn't mention this in your video.

Once again,thanks so much.❤👏🏻👏🏻👏🏻

I had to have my expansion vessel replaced as the diaphragm failed. Spot on now though thanks to my brill plumber👍

Thanks for your video - very informative. Would low pressure in the system mean that the water doesn't heat up or come through? I had a cold shower tis morning!

Twice now I have had problems with pressure increasing. Both times it was the in circuit filling loop valve passing. The maintenance contract company didnt seem to take my suggestion seriously so on one occasion got a new plate heat exchanger out of it. Of course it could have been a holed phe or pv diaphragm. But there you go! My sons system was losing pressure. Dripping drain cock under the floor

Perhaps it's worth saying something about the 'lovely' (unique) Range Powermax (not to be confused with the newer Potterton Powermax) boilers, which have known design problems that eventually lead to the pressure sensor and perhaps the pressure relief valve (PRV) getting gunked up, as they are at the top of the boiler and can get also trap air, leading to false (low) pressure readings. Topping up the system then can temporarily clear the air (moves it around for a while but is hard to purge, especially if you live in a single storey home like a flat), but can easily break the expansion vessel by over-pressurising the system, also causing the PRV to let by nearly all the time when the boiler is in use, leading to the PRV's failure in quick succession. In this case, those boilers have a relatively low operating pressure (0.9-1.0 bar when the system is 'cold' at 40degC [operation at 82/71]) but the boiler normally switches off on 'low pressure' at about an indicated 0.4 - 0.5 bar, even if the real pressure is higher, due to the design flaw I previously described. The best way to reduce the gunking up around the pressure sensor, boiler automatic air valve (AAV) and PRV is to make sure when those new parts are fitted, the system is drained down as best you can, flushed/cleaned and refilled with fresh water dosed with the correct type and level of inhibitors to stop the gunk (sludge) forming. Servicing of this type of boiler (a unique design concept) is difficult to say the least, and most plumbers either haven't got the training to work on them (which is what led to the retrospective regulation to install access panels on all concealed flues [different problem for another conversation]) or who shy away from working on them because they are difficult to work on or diagnose issues without lots of experience. When they are working, they are actually quite good at providing heat and DHW from a relatively low output boiler at a seasonal efficiency of around 83% - not bad for a boiler design from the late 90s/early 2000s.

Hi there, I tried turning both the black valves right angle but there is another blue lever little down do I need to turn that as well

Hi, interesting stuff, thanks. In the last 10 days or so every morning I have low pressure in the system! I have checked all radiators in the house and all have water at the valve quickly? Which to me means my system is full!!

Hi Roger, I am topping up mine now using your excellent instructions. First time in 8 years, so I think it’s a good system!

SB. Can you review and explain the pros/ cons of Electric Central Heating Boilers to run wet radiators and hot water?

Good to see Brits doing tool channels good vid m8 .

Hello, first i want to thank you for the great work you're doing by educating all of us 😊 Second i want to ask if you can help me with my problem. I have a combi heating system Junkers, which is losing pressure every time i use the hot water. Also, a few times a day it starts rumbling really loud and, the temp goes higher then normal and the pressure arrow starts jumping up and down until it settles down and water temp does down again. I've checked for leaks and swapped the expansion vessel. I dont know what else could be. Is it possible that the 3 way valve is defective and needs to be changed? Sorry for the long read and thx in advance 😊

Yep, there is so many different combinations, nice to see someone do this video, on a system, where the filling loop, is not in the combi boiler, you lot in uk use. Nice to see someone do a variation on this, as normally these vids are done from uk, and most people there use combi boilers, and the filling loop, is attached mostly inside that thing. While other countries do not often use combi boilers, and thanks, for showing this vid, on a variation, where the filling loop, is not in the combi boiler. Mostly outside uk, people are not using combi boilers, so its nice to see, you understand there is a wider audience, then just uk residents, whom are mostly using combi boilers. But like you say, there is many a variation on all these things, and different plumbers in all countries, may install all these srts of things slightly differently. So thanks again, for showing, a different variation, of this, instead, of doing what most of these vids do, ie just show, people filling combi boiler systems, that most in uk, probably use. In your video on expansion vessels, can you also show, you measuring its pressure, not just pumping it up. thanks.

Great video. I've got a Viessmann Vitodens combi and have topped up the water pressure in to the green area, but it doesn't hold the pressure. i'm topping it up on a weekly basis. Any advice?

Funny you posted this today. I'm a maintenance man for about 90 apartments. I had to cut, drain and repair a 1" copper heating pipe that was leaking in a closet today. When I got ready to turn the water back on and bleed the (4 apartment, 12 bedrooms total) system, there was no water pressure in the boiler. Turns out the pipe feeding the boiler inlet valve had rusted and collected so much crap in it, there was no flow. Sure was a bitch figuring that out. What a day.

Great video as always. Quick question. In my memory, we had pressure loss problems with our combi boiler, probably over 15 years ago now, and British Gas sorted it out by installing one of these little red tank thingies! It installed upstairs in the airing cupboard. Our original combi boiler is over 20 years old and on its last legs, so we are about to take the plunge and are planning on having a new one installed in its place, which will probably be a similar, if more modern, up to date combi style, which I believe makes for the easiest swap out/installation. If it’s not too silly a question, can I ask, will having a brand new combi installed make the pressure tank thingamejig redundant? Or pointless. Will it need to be removed from the airing cupboard when the new boiler is installed, or is it possible such a device can simply be left in situ, or will it impair the functionality of a new boiler? Cheers

I have a question which I can't find the answer to on Google. When I was cleaning the other day, I accidentally went a bit too close to the central heating control panel and I think the smallest amount of water must've leaked its way inside. The control panel started to flicker and slightly buzz. I grabbed a wooden spoon and switched it off. I haven't put it back on yet. Wondering if it will be safe to switch back on or even put the heating on or should I leave for perhaps longer? Have tried searching on Google but cannot seem to find an answer anywhere.

Does the heat hero on a gravity fed heating system with a back boiler really work

i just replaced an old boiler (Combi) with a brand new one, paid £1900 and the boiler wont hold pressure for more than 12 hours!! im being told by the company that fit it that i must have a problem with the old pipes and that the fact the system doesnt hold pressure it isnt there problem as i only paid them to fit a working boiler and as far as they are concerend have done their job? this is the first time ive had a new boiler installed is this normal for heating enginners to do ? from the way they are speaking its standard practice theyll charge almost 2 grand and still leave a customer with no heating. anyone had a similar experience ?

Hi Roger and contributors. Our Grant engineer came out this week and spent 2.5 hours checking over the system. He removed the internal 10l expansion vessel which had failed and was full of water. This unit was supplied with the boiler . leaving the external 25 l vessel in the loft. He checked the valves and seals and re-seated some bits. From what he reported looks like it must be the pipework. Need to see f we are still loosing pressure over the next week or so. Thank you all for your helpful insight.

I have recently changed the pressure vessel and valve and pump on my boiler but noticed that there are leaks around boiler pipes what is the problem? I can hear drops of water but can not see where

Hi any ideas on F2 fault on a glow-worm boiler?

I’ve got one of these it’s not connected to my boiler but it’s at the bottom is in the cupboard, I am visually impaired I’m getting a friend to check it out for me Thursday as the council should be doing this regularly when they do their safety check but never bother to check it when I asked thank you for the video because it’s informative so I know where the needle should be as sometimes my boiler vibrates from time to time this might be because of air in the system I will find out on Tuesday to see what’s what as I can’t see it myself.

Hi Roger would like to see a video on how to bleed / refill an underfloor heating system. MANY THANKS

When should the vessel be topped up with air ? When the system is empty of water ? Full, hot or cold ?

That was handy .... that guage has always puzzled me. Ours goes up and down of it's own accord .... seems that's OK after all :-)

Roger, great tips and very much like your advice BUT.... I have to keep re-pressuring my system (1960s 70s) and just had a new pressure vessel fitted BUT I have concrete floors, no sign of damp at all in ceilings or floors, only recently started problem hence new pressure vessel and piping associated, what else can I do or look at. Plumbers scratching their heads as well....

What about if I don’t have the two valves? Last time a plumber attended to our boiler he changed the filling loop with no valves. There’s one big valve that I can turn with my fingers but when I turn it to open water comes out from that valve.

Is it normal to need to fill up the system a week after i bled it all out? Hot water is not as hot either

THANK YOU. I will call my boiler engineer. I'm having to put pressure in everyday. I get an E19 error code.

Did you ever do the other video on the expansion vessel needing recharging?

What about modern Boilers such as Valiant or Bosh. Regards

Many thanks for posting this, it covered pretty much what is happening with our system and was really useful. At 2:26 you said that frequent pressure loss is likely to be that the expansion vessel has lost it's charge but at the end you say it may be time to get help. I couldn't see a video about repressurising the expansion vessel, is that something someone with reasonable DIY skills could do or is it a job for an expert? Thanks, David

Hi firstly I love your videos. I had a problem with my heating system during the cold snap. My hot water pressure gauge was maxed out. And one of the pipes burst. I replaced the pipe. the system now works but makes a gurgling noise. The hot water pressure gauge doesn't drop below 2 bar (as if it has lost calibration) when I turned the PRV to release the pressure it made a mechanical vibration sound and returned the needle to 2 bar but won't go any lower. Now when I try to repressurise the system, the needle doesn't move from 2 bar. I believe the system doesn't have any pressure even though the guage is on 2 bar because I pressed in the valve on the expansion tank and no air escapes. My heating works but I think I'm running it with no pressure. Any advice greatly appreciated. Thanks for your videos.

Great video Roger This subject has has our engineer baffled for over 12months. We are loosing half a bar in 3-4 days, no sign of leaks and radiators pressure tested ok over 2 days in the summer. New larger expansion vessel fitted. Must be the boiler. Manufacturers engineer is heading out Monday, interesting to see if they can locate the problem. The more info I have the better.

Could you please explain how do we tell that the pressure is low and what the problems do we run into if we don’t fix this issue?

Skillbuilder What do you think about wall-detectors? Do you have some smart tricks discerning hidden dangers in walls?

My fault, I drained too much water out, it was holding it steady OK .the guage went down to about 0.5bar when cold. I opend up the feed from the mains, and now I cannot get it to go back up to about 1 bar. does the expansion tank need a recharge or is there something I am missing here ?

Do you always have to bleed every radiator after repressurising? I thought you only had to do one radiator. I have a combi boiler.

Needle didnt even move hahaha!

Mines been getting worse and worse and even though it's had 2 lots of leak blocker, it's still leaking. It's got to the point where I'm topping it up twice a day! I thought I fixed it as the fill tap was leaking. So I changed it with a combined tap and non return valve, the braided hose and the pressure guage because it was Donald.

Whats the process for a heat pump Roger?

Awesome, saved a heating engineer callout! You are a legend Sir! Had zero pressure, boiler not firing up. 4 Degrees outside. Checked the filling loop, valve was shut. Opened it up and within seconds the pressure went to 1 bar and hey presto, we have heating again! Had a plumber out here to fix a leaky tap last week and the bozo must have shut that valve. Presumably it remains open all the time?

What could be the reason if the red needle is above 4, does it means there is a leak somewhere?

Hi I have a combi boiler and the pressure it’s going down only when I put the heating on even for 10 minutes only if it’s just for using hot water it doesn’t go down ! Why?

Haven’t checked the gauge in years

Thanks for the tips. Our pressure meter was close to 0 and the boiler cut out. Added water by opening the tow taps - luckillly permanently connected - and all seems fine. Question is what causes the pressure to fall and how long should one expect 2 bars to take to falll again.

In my case discharge ( ohh matron! ) from the valve escaped from a pipe concealed beneath the sticky out bit along the base of the patio doors so you gotta look for these things.

Thanks. When we lose pressure the boiler runs the water through to garden overflow pipe without raising the pressure. The boiler setting is 2.6 bar but the system pressure can;t be raised above 0. Frustrated!

Hi my girl friends house has got a red vessel and coming out of that she has her water pipes, now one of the water pipes has a little black cone shaped unit between the 2 water pipes and it has 2 holes in it, now hers you can see water constantly running through it and water is splashing out side this unit causing water to run down the outside the copper water pipe and it’s causing her sloping ceiling to have a wet water mark which is then running down her hallway wall any idea please as we are desperate, I may have to turn off the mains water valve under the sink

Hi, could you please explain why constant fresh water into the central heating would rust the rads away? Thanks advance

I have keep filling my boiler every day and when I actually open the loop the pressure gauge it donsent even move it only starts to build pressure when I reset the boiler, I did find a radiator with a very small leak