Replace Radiator Valve In Depth Detailed Instruction, with Out Draining the System. Part 2.

This video covers all the FINE DETAIL and PROBLEMS that you may come up against when replacing a radiator valve. Whether its a standard valve for another one or to replace a standard valve with a thermostatic valve or a thermostatic valve for a new thermostatic radiator valve. Then I have made this video for you.
I have speeded all clips up to give you as much information as possible. Please let me know if you like or dislike it speeded up in them comments. Thanks.
You can easily adjust the play back speed faster or slower, by clicking the 3 little white dots in the top right hand corner of any KZbin video and selecting playback speed.
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Links To Other Help Videos
VIDEO: How to replace a leaking Radiator Valve. With out draining the system.
• Replace Radiator Valve...
. How to plug / bung a loft tank.
• Loft Tank Plugging / B...
. How to replace a radiator. step by step detailed instructions.
• How to Replace a Radia...
. How to remove a radiator for decorating.
• How to Remove Radiator...
. How to refit a radiator after decorating.
• Re-Fit Radiator After ...
. How repair leaking radiator blanking plug.
• How To Repair a Radiat...
. How to add inhibitor into your, with out draining the system.
• How to add inhibitor. ...
. How to flush out your radiator
• How to flush Out a Rad...
. Boiler continuously losing pressure.
• Boiler Keeps Losing Pr...
. The Gas Safe Register.
www.gassaferegister.co.uk
If you want to support me further then please leave a Donation in my
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[@jason_ball]

Excellent detail, much more informative than other videos I've watched.

[@mandeeplalli4653]

Best guy on KZbin so detailed with all the materials and experience

[@xxxxxxxx3476]

Many many thanks for your complete explanation of how to tackle radiator valves replacement and servicing .

[@paulgibbs6616]

Thank you, followed to the letter and switched a broken thermostatic valve really easily.

[@NAFO_Badger_Brigade]

This is the best! This going to be essential homework for any apprentices joining me on site!!!

[@fielding68]

A terrific tutorial. Packed full of useful info. Thank you.

[@lynseylou8793]

Fantastic tutorial! I just replaced a thermostatic valve and remounted a radiator with no previous experience! You sir are a legend! THANK YOU!

[@EddieFox]

Thank you for a thorough coverage of this type of job. Much appreciated.

[@colin6285]

Great tips, concisely explained by a professional plumber. I’ve not seen anyone else demonstrate it better.

[@ben194808]

Thanks for making this video, very, very helpful. Good to see a professional sharing his experience.

[@henryjohntobin1]

Mark, thanks so much for your time in making this excellent video. I have followed your instructions and replaced a knackered and rusty bathroom radiator and old valves with a new towel radiator and new valves. As you say, there's no need to drain down if your instructions are followed. I have saved loads of time and hassle by not draining down. Thank you 😀👍🏼

[@Jonathan-bo7ef]

Very glad I found this video. Thank you!

[@sebcook881]

It took me a while to do it methodically. But this video was a life, and cash, saver in this cold weather so close to Christmas. Really glad I watched the in depth one as would have been scuppered by a couple of the issues stated. Can't thank you enough!

[@paulmason1759]

I’ve just finished this job, having followed your instructions carefully. It all works! My radiator is now nice and warm, with no flooding disasters. Really grateful for the time you took making this video. Thank you.

[@chrishard7616]

Nice work....thanks for sharing all the tips, I prefer the long version giving all the extra info as that way one can be better prepared.

[@danebarry8073]

Really appreciated the clear explanation and time taken to show all of the steps you need to carry this out. I’d been having some trouble completing this task recently but your video alerted me to where I was going wrong, Thankyou for posting it

[@BH-gn6dl]

Have always been scared to do this, have changed radiations in the past. However I have avoided changing the valves. So clear on how to do it, thank you.

[@paula-kx1op]

Thanks for a very informative video, i have learnt so much from watching your video and now feel so much more confident in tackling replacing a faulty TRV.

[@MrColinjsmith]

@ 12:08 only your video truly explained a key component. I could not truly understand how without your video. :) Video saved and I have subscribed. Thank you so much

[@davidparry8210]

Thanks Mark great video. Helped me replace the lockshield on my lounge rad with a TRV body (seemed to have been setup as the pass-thru radiator so always overheated the room in winter - I swapped this to my bathroom radiator). I needed a stepped spanner to get teh rad tail off and fit the new 15mm tail (like the key you show you had made at about 42:00). I couldnt make one as didnt have the parts or time so bought a stepped spanner from my local plumbers merchants and the tail turned out to need the 16mm hex.

[@tonyoheidhin6509]

great video , need to replace a thermo valve , might chance it when the missus goes out , thanks

[@ryandow3954]

Really good video and really informative. Thanks!

[@scottnichols888]

Thank you very much I have learnt a few tips and tricks from this , I only wished I found this earlier.

[@kevinbenstock8116]

Brilliant Mark, great video, you went into great detail of things that we might come across , most helpful, because most DIYers watching this will not be gas safe, household plumbing videos will be great if you can do more, thanks Kevin

[@kevinbyres8561]

Brilliant video and tips. Thanks a million.

[@woodgnomebambi]

Fantastic video thank you...really clear, detailed and very helpful!

[@bain6514]

This has helped so much. Thank you.

[@markjohnstone1618]

Simply brilliant!!! thanks

[@prentismab614]

thanks good job. watch this at 04.30

[@j.j8114]

Great vid mark! did laugh a few times due to the speed, it's like you've had waaaaaaaaay too much coffee!

[@TyneBridge90]

Very informative video !

[@davidwilliams6553]

Great video, thanks.

[@bobbit2002]

This is very good. Thanks!

[@MrJohnnynapalm7]

Very good video 👍

[@jamesp1322]

Thanks for this video Mark, it was really insightful and gave me the confidence to tackle the job. One small issue I ran into was I couldn't get the old olive off the radiator tail/spigot so was unable to reuse it, forcing me to replace it and the new one I got in the pack with the TRV was a few millimeters too short to provide a good seating into the valve. In your video you mentioned you can get longer tails/spigots and cut them down to size, which is a good solution but I also found a telescopic tail (Screwfix 10954) which can be adjusted to be just the right length. This allowed me to get a good seating between radiator tail and value! Not sure if you've covered it in previous Q&As but I'd like to know if the process is any different in a downstairs radiator on a combi boiler system?

[@RayMondElec]

Excellent video. Thank you for taking the time and trouble to do it. Not to slow and not to fast. Just one point, you mention using jointing compound and ptfe tape on the olive and radiator spigot. So way not use the same method on the tapered thread part of the radiator valve.?

[@alexnorton6625]

This is a superb video, thank you!!!

[@alexnorton6625]

Massively underrated video. Managed to change radiator and valves having always thought it was the dark arts.

[@matt--mun6797]

Great video out of interest in the scenario that the olive was stuck solid on the pipe, is it an option to reuse that olive?

[@nutCrack5]

Solved a lot of problems.

[@806cat]

Does it make sense to drain the system if I want to change a few TRVs? It sounds like it might be less hassle in the long run. We have just moved house and there are a number of sticking Drayton TRV3s. I have managed to loosen a couple but one is stubbornly stuck shut now and the pin won't budge.

[@ek6868]

Hi,tanx for the upload can you use jet blue jointing compound instead of ptfe or loctite tape on the spigot going into the radiator?

[@ralphburton6947]

Very helpful, thank you very much

[@ralphburton6947]

Job done, very little mess, no leaks, again thanks

[@Doovde69]

Hi Mark, Is there an option for doing this with a vented F+E system (mines is a Boilermate 2000 thermalstore). I'd really like to be able to isolate flow at individual radiators to do valve replacements seperately?

[@TheRichardgomm]

Awesome advice, however I would want to replace the lower nut and olive do you not do this as routine?

[@bruce84]

Hahaha good video apart from the obviously sped up footage of him showing how ‘’fast” he can change a radiator valve! Like a Buster Keyton film!

[@spencerweems]

Hi Mark, Merry Christmas. I’m just in the process of refitting some radiators and am having trouble fitting one of the new valve tails! It looks like the original valve wasn’t fully inserted and the thread is now rusty/dirty black ? The new tail will only turn a couple of times before it stops dead! I’ve cleaned out all the old ptfe tape and also tried cleaning the thread with wire wool but still unable to fit the tail fully! Please can you advise on what can be done so I can fit tail fully. Thanks Spencer

[@malcolmbale9566]

Got a problem taking radiator off for decorating, I’ve got some caps for the valves but the problem is the trv valve doesn’t work, I know I can push the pin down & hold it until it’s capped but the valve the other end doesn’t seem to be holding because the pressure on the combi boiler is dropping!!, apart from draining down do you have any suggestion?. Great channel for information 👍🏻

[@Anoymus985]

Hi wen u say take the presser out the system if its a combi boiler what exactley do u mean..do u mean the presser out tje actual boiler or the raidieater

[@chrisripley2257]

Hi there mark have you got a video how to add a new radiator to an existing system teeing off another radiator thanks chris do I need to empty the System

[@johnfoster8280]

Hi Mark, very informative video and immensly useful. I have a question regarding a leaking radiator. Can anything be done to temporarily stop the leak until such time that the rad can be replaced?

[@diymanbelfast2897]

Mark Im changing a valve but its a oil fired system. I tried to drain down one side but the water seems to keep coming. How do i stop the water, I have the heat off but dont know if I need to shut something in the attic. Thanks

[@JohnSmith-ox7xc]

Do you have any videos dealing with wanting to drain the whole system? I'd be interested to know if there are tips to identify if there are different legs for downstair radiators, and if there anything to make it easier to drain them than going through them one at a time. Thanks.

[@Dobbo001]

Hi Mark, where is the link for " how to plug the header tank" please. BTW great instructional video's.

[@navz10015]

Hi Mark, how would you remove a radiator that has corner valves, with copper pipe going directly into the wall behind from the valve?

[@Slogger62]

I am changing an old radiator with a modern one. The thermostatic valve set will fit the new radiator but not the central heating copper pipes. On the pipes, where it connects to the old valve there is a male threaded nut screwed onto the end of the pipe. Is there a connector I can fit between this and the valve fittings?

[@rtyrtyrtyus]

When you drain the water pressure before removing the valve, do you need to do anything for a system with a loft tank?

[@neilbrice449]

hi watched your video ive just one slight concern that when yo undone the nut on the rad a lot more water would come out of rad than you showed a piedce of kitchen towel would not stop this i usually drain water from rad before procedding to change valve not a dig on you just wanted to point this our thanks

[@cursedhorus724]

Hi Mark, I'm looking to replace all of my radiators in my house (total of 8), would it be best to just drain the whole system or follow the steps of draining each radiator individually? I have a combi boiler system. Thanks

[@spudcat13]

I live in a ground floor flat, I am thinking of installing thermostatic values on my radiators, I have 6 in total and a combi boiler. could I follow this process if I isolate each radiator 1 after the other??

[@brayhead]

What do you do if you have a water tank in the loft? How would I go about it then. Do I just do what you did in the first video. Many thanks

[@andrewbayliss5421]

I wish to replace the valves on two cast iron radiators which are on the same line of pipes for TVR valves. I have shut off valves further up the pipes in the same room. Any tips on how to replace the valves?

[@joedimaggio3146]

This is Brilliant Mark. I love the detailed videos, it gives us DIYers a chance to actually learn vs watching a short video for a quick fix. PS, is your wedding ring an olive? 😂

[@richardwilkinson77]

Great video thanks. Can I use plumbers mait as sealing compound as I already have a tub of that?

[@MarkBallardLTD]

No, that's not what its for.

[@martingalvin2005]

I have a flame failure on my boiler and it won't let me build the pressure up. Any ideas please Mark ? I followed everything, I have a combi boiler in my loft and the radiator valve I was replacing was on the ground floor in the living room.

[@piotrekbernacki3306]

Can you cut into pipework to put it different size radiator same way as you did over here? I mean if can I do it without draining the system

[@David-fj5lz]

Will an old wine cork do this better, not sure whether size ok as l do not drink wine?

[@joekane23]

Is it the exact same procedure if the radiator is downstairs I’m enjoying your clear and precise tutorial

[@MarkBallardLTD]

Yes it is. Except there is more chance water will keep coming out of the system/pipe. Just swap valves fast. If you can.

[@botany500kojak]

I have a minstral thermostat valve which does not have an olive on. It has a reducer. Pipe is 10mm. There is a leak from the copper pipe/reducer connection. What do I do there? Cheers.

[@robsharp968]

Great video Mark, thanks. I did come across one problem which I didn't see in the video. My radiators have the larger flange-connector (no olive) into the radiator. I managed to source some of these but it was only when I started to tighten the larger nut onto the new valve that I realised that the new valve has a differnt thread from the old one. The new valve's thread was much coarser. I've had to put the old valve back on temporarily, and I guess I may have to change the spigot, assuming the new spigot has the same thread as the old one! I didn't realise that there were different threads available. The radiators have been in situ for probably 30-40 years though so I suspect that standards may have changed.

[@MarkBallardLTD]

I can't remember any threads in radiators being different. But some radiator valve can have different threads😖.

[@robsharp968]

@@MarkBallardLTD Thanks Mark. You're absolutely right. The issue was the thread of the large nut on the original spigot was different to that on the new valve, so we just replaced both valves and spigots with new items.

[@jamesstickle2120]

Great video, I have 10mm plastic speedfit pipe going into my existing radiator. Can I use this same technique to replace the radiator valves & 10mm to 15mm elbow when I install a new towel rail?

[@MarkBallardLTD]

Yes should be exactly the same. Always have one pipe capped off. To maintain hydraulic lock.

[@jamesstickle2120]

Great thanks I will give a go, hopefully won’t need to drain the system down now.

[@jamesstickle2120]

Swapped the original radiator for the towel rail, this technique worked great. Thanks

[@MrMacNB]

Thanks for the instructional video. In our house we have 10mm pipes coming out of the walls horizontally and then turned up 90 degrees to the valves. Looks like the valves are 3/4inch (not 1/2in) to the rad. I.e. 10mm to 3/4in to the rad. Also the it's a sealed system - i.e. with a system boiler and a megaflow cylinder. I want to a replace two rads + the valves on the ground floor. In your video you mention Combi boiler & loft header thanks but I have neither. Will your method still work with my system ??

[@davefb]

Yeah. I'm just at the 'watched loads of videos,, about to go for it ..and... hmm thats microbore'

[@dembydish]

So if you are working on a radiator downstairs, should you isolate all the upstairs radiators by shutting both valves or just the TRV? How about isolating the downstairs radiators? Interesting video.

[@peterlock9264]

Mark can you use a manual valve either side of the radiator, ie the thermostat and lock shield side. Are they any different, because in Wickes they sell a valve with the thermostat top and a lock shield top with it. Peter

[@Mr53T]

How do you cope when you want to change the old valve nuts for the new ones that come with the new valves because the old ones are manky and the pipes are not able to move. All this while the system is full.

[@fengbi5653]

Hi Mark I’ve fitted a new bathroom towel rail rad to the wall and the old valves do not align so obviously I have to bend and join pipe to fit the new valves (9” higher.) . My first question is ,can I still use your non drain system to do this or will I have drain the entire system? Question 2 if there are 7 radiators above the one I’m working on can I use your system if I isolate those radiators ? Thank you 👍I’m glad I found your channel I’ve found it very informative 🤔

[@MarkBallardLTD]

I would say yes. I've done that for sure in the past. in the end it's just down to how the water flows in your system. isolating both radiator valves on every radiator above. would definitely stop the water from coming out but then even then this is no guarantee that water won't come out. just do one pipe at a time. Keep the other one capped /isolated. And with any luck you'll be able to do it. No guarantee. What have you got to lose you try it if water comes out and you just have to drain.

[@fengbi5653]

@@MarkBallardLTD Thank you Mark I will give a try . I never new this could be done without draining the system, excellent thanks again👍

[@mohammedashfaq997]

I got brand new radiator it gets hot 🔥 and then it's go little bit warm although the boiler is on same temperature why that happens

[@ryandow3954]

I would prefer it normal speed even if it meant the vid was longer, it can be hard to follow sped up, but still really enjoyed the video!

[@MarkBallardLTD]

Thanks for the feed back. I may just edit it slower a bit.

[@lmaoroflcopter]

Use KZbin video controls to lower the speed. .75x is about bang on for normal conversation.

[@STEVEHOLE1]

Enjoying your content, but have a question, i have 2 pipes quite close together which have blanking caps on them, i know they were inlet and return for a radiator that was in place a good few years ago, i am going to install a little radiator on the wall, above these two pipes, the main boiler worcester 28i is upstairs, the little room downstairs, how could i test to see which was the inlet and which one was the return without draining the system if possible, if i turned all the valves to off on the other downstairs rads would that stop water coming out the inlet, i am guessing before all that i should put the heating on and one pipe should get hot, any advice appreciated.

[@MarkBallardLTD]

That is a tricky one, you can do all sorts of things to try and work this out and still have conclusive result. My question would be. why you need to know no. the flow and return on most radiators and radiator valves it doesn't matter. unless you are putting in a straight trv then sometimes they only have one direction. The way I would do this is just a fit it and then you have a 50/50 chance which way round it is. if it's wrong just turn the valve over and then it'll be the right way round. you should know it doesn't matter which side you put the thermostat on the flow or return makes no difference these days. Hope that helps anyone else who's got this problem

[@MarkBallardLTD]

If you definitely need to know. the one of the best ways is just to put two isolation valves on the two pipes connected together with a length of hose . Turn on your central heating get the heating nice and hot then open both isolation valves see which one gets hot first. That's your flow

[@STEVEHOLE1]

@@MarkBallardLTD Thank You i was worrying about nothing, it doesn’t make any difference when on. a Combi, Thanks for your reply 😊

[@stephenk0nig252]

Great video with detail. Q: Why doesn't an olive twist? A: Because the surface area between the face that seals is much less that that against the nut (and so higher friction)?

[@MarkBallardLTD]

I would agree with that.

[@b1h2u3p4]

cant you use jointing compound instead of ptfe on spigot

[@darrenmckeown990]

Looking to replace my rad valve with a drain off valve on a downstairs rad. Can I use the same technique that your doing in this video so I don’t have to drain the system first.

[@MarkBallardLTD]

Yes

[@rad1sh480]

Thank you for this very informative video. One thing I'm not quite clear on, do you turn off the mains water supply? Trying to understand why the water stops flowing from the pipe into the floor leading to the valve. Please excuse my ignorance.

[@PaulintheUK86]

Did this today and had the same question, the answer is yes... Otherwise, it just keeps draining to no end!

[@MrColinjsmith]

What's the name of the sealing compound? I think its V-2 PLUS, but they may not have that specific one at my local suppliers. Could you give me names of another type, Please?

[@MarkBallardLTD]

Your plumbing merchant will be able to give you a good brand of joining compound

[@deangerstel2980]

Hi Mark. I must confess, I am a little puzzled. When "releasing pressure" from the rad, why did you not close the valves first? This is really going to show my ignorance...Wouldn't water within the pipework continue to flow into the radiator as you were releasing water through the bleed valve at the top of the rad? Especially, if the radiator was on the ground floor with lots of radiators and pipework above it it throughout the 1st floor. Doesn't all that water in the above pipework flow downwards to nearest open point in the system, in this case the radiator you are working on? I know that you said that you you prefer to not adjust other valves within the home whilst undertaking this type of job, because of the risk of creating further leaks. Hope that make sense. 😄

[@HannaHasAPlan]

So my husband loosened the valve and didn't support the pipe. It has a kink in it and is leaking. How do we fix this? 😩

[@Bikeaddict4235]

Boiler manufacturers and possibly thermostat valve manufacturers will always tell you not to use jointing compound as it can block up parts

[@BrianWMay]

SLOW DOWN !!! The speed is counter productive.

[@Littleginner1976]

Dooh sorry 🙈👍

[@Littleginner1976]

Take a breath PAL

[@paul_my_plumbs_uk]

If you work as quick as you talk your average videos will be 5 minutes long 😂😂😂 please slow down a bit 🙏🙏🙏🙏

[@lmaoroflcopter]

You can use KZbin's speed settings to allow the video, he explains this in the intro that he's sped it up deliberately. .75x speed is about perfect normal conversation pace. You can select a speed using the three dot menu in the top right of the video if watching on a mobile device. On the desktop it's under the cogwheel menu on the bottom right of the video.