How to easily put inhibitor into a radiator on a Combi heating system

A neat little device for pouring inhibitor into your radiator if you have a sealed system. Here is the link to buy from my Amazon link www.dereton33.com/page197.html
here is the link for inhibitor amzn.to/2Mzrw8a
I also now have an Amazon storefront for all plumbing parts. It is www.amazon.co.uk/shop/dereton33
Got your own plumbing or heating problem? Ask Al at: www.dereton33.com. For mobile phones www.dereton33.co.uk.
Saved money on plumbers ? Donate here, using Al`s site link. www.dereton33.com/page118.html Thank you.

[@vivienneslayford165]

Fantastic, so clear and easy to follow. I’m a small small female - 4”11 who recently lost their partner to cancer and also have a shoulder that likes to pop out when under pressure (dislocation), which means thinks aren’t so easy for me and your guides are great. Sorted my radiators out in no time with no problems

[@dereton33]

That`s great Vivienne.

[@spookydreamer7370]

Sorting out presure dropping, checking leaks and such like, so may have to add stuff to system. This was really clear and so helpful, made me feel more like tackling the job. Thank you.

[@dereton33]

No problem Spooky.

[@AlanUK78]

i don't often comment on video but thank you for this. very helpful. not so scared of doing this myself now!

[@bonypp]

I feel I could do that actually. I’m actually obsessed with all the plumbing videos and never thought I would love plumbing. I feel I had the potential to be a good plumber if I did study it full time . Having said that I wish I had enough money to just pay off a plumber and have less stress in life . Thank you AL for helping me to learn something new .

[@dereton33]

No problem, keep at it.

[@barnbersonol]

These jobs are easy enough to do but hard enough so you feel really chuffed/clever when you do it. Why pay a minimum of £60 for someone else to do a ten minute job for heaven's sake?? I once paid a plumber to remove a rad prior to plastering and felt so stupid when i saw how easy it was!

[@ottileewhitlock5549]

Brilliant, you just saved me £200, thank you!

[@dereton33]

No problem. Mines a pint of John Smiths, ha ha.

[@nevmetson6145]

Hi mate, great video, helped me 'inhibit' my new heating system today, quickly and painlessly, many thanks

[@dereton33]

No problem Nev.

[@ianwainwright6391]

Made what seemed like a tricky process look easy ! Cheers for the video. Keep up the great advice.

[@dereton33]

Thanks Ian.

[@thomasturner5896]

keep up the good work, on your videos,well explained.

[@dereton33]

No problem.

[@TheRealBobT9157]

Brilliant, simple clear information - I feel confident that I can do this myself, thank you!

[@dereton33]

You can do it!

[@bonkeydollocks1879]

Great video and such a great help as always , you have a great way of teaching stuff , many thanks

[@dereton33]

Thank you for your kind comments.

[@malcolmjames7388]

Good video, nice tip , well explained. Thanks for the video.

[@dereton33]

No problem.

[@DjGiluk]

Excellent video 👍🏻 this really helped me understand my combi system and what I need to do. Thank you 👍🏻👍🏻

[@dereton33]

No problem 👍

[@mumanddad8107]

Hi, I am in the construction Industry and what I do like about you is that you are very down to Earth and you explain it very well for the general public to understand, not like some videos on here. Also I like your apprentice Camera woman, who I presume is your Mrs, so well done to her and also for asking the questions, good camera work. What I do like about you is your attitude, you take me as you see me, cap and slippers as well. You should get paid off the deodorant firms, Brut and Lynx etc for the free advertisement for them, 🤣🙂 Good one Mate 👍

[@dereton33]

Ha ha thanks .

[@kevinquevem]

gifted gentleman. a rare quality these days. many thanks!

[@dereton33]

Thanks Kevin.

[@mattjames88]

Such a good teacher

[@dereton33]

Thanks Matt.

[@rickyp3779]

Really well explained, Thank you so much.

[@dereton33]

No problem Ricky.

[@paulwebber2928]

Hi Alan nice to see you still in the trade passing on your knowledge, nice camera work by the wife lol. Best wishes Paul

[@dereton33]

Hi Paul, nice to hear from you, hope you are keeping well. Gravesend council seems a distant memory now, but happy times.

[@lunny74]

Thanks for all your videos, very helpful and have saved me lots of money as i'm now able to do these plumbing jobs myself. Cheers

[@dereton33]

No problem Matt.

[@Chef1Mat]

thanks, i will try it.

[@pierombon]

Great piece of kit

[@dereton33]

Sure is.

[@billbutler9862]

Thanks, good explanation.

[@les007new]

Brilliant videos. Very helpful

[@dereton33]

Glad you like them!

[@michaelflynn6178]

Helpful as always Thanks

[@NIQBAL21]

Hi, After watching your videos, we have tried cleaning our heating system. So far, no problem with it. Thanks for your wonderful explanations and guidance on this.

[@dereton33]

No problem.

[@andyowens5494]

Just made my own equivalent of the Eeztfill from an old rad valve and short piece of 15mm pipe; I had a funnel lying around in the garage, and that fits into the pipe nicely. Just screw the tail into the radiator, attach the valve and pipe (keep it separate from the tail, so the tail screws in to the rad without the pipe catching on the wall!), pop in the funnel and pour. Saved £15 by just using bits of scrap plumbing.

[@dereton33]

Great

[@agnostic47]

Those Eezifills are ridiculously expensive for what they are, a copper fitting and a plastic funnel. Now selling for £18 on Amazon. Should be about £4.

[@shifty2755]

Thank you for not being American. Great video I'm going to tackle this myself now I've seen you informative video. Thanks a lot.

[@dereton33]

No problem.

[@ccaissie113]

could use subtitles

[@650GSF]

Handy thing to have, could do with putting inhibitor in mine, as I have had to empty the bathroom radiator a few times.

[@debbiesurman7166]

Nice guy, explained well, thankyou.

[@dereton33]

You're welcome!

[@TheRobtrident]

thanks for the video it has helped me out.

[@dereton33]

You're welcome!

[@protabali2203]

Fantastic as usual thanks allot fella

[@dereton33]

+Protab Ali No problem.

[@timewoundsallheels4ever]

My radiators don’t have a wide opening like yours, I do envy you! I have to pour cleaner / inhibitor into the system via the tiny bleeding valve opening (I have a combi boiler) which is a pain as none of the “easy” devices work without majorly leaking. So I made a little device myself with various tubing sizes to fit at one end into the bleeding valve opening and at the other onto a screw lid that fits onto the solution container. Need some good sealing tape to keep the tube firmly and leak-proof in place at the radiator opening. Takes me all day for draining system, adding solution and filling system up again. And if I’m lucky, like today, none of the bleeding valves and draining valves are leaking when all is done.

[@dereton33]

Thanks for your info .

[@ModelsExInferis]

Thank you so much for this excellent video! I was looking for a video on how to get leak sealer into my system but KZbin is full of Americans fixing car radiators. Saw your video and not only do I now know how to get the sealer in I've learnt why some of my radiators aren't as warm as others. My Mum will be thrilled if I can get her bedroom one hot! Thank you!

[@dereton33]

No problem.

[@ratchriat1716]

handy little device thanks for the video

[@dereton33]

No problem.

[@MyOutdoorVideos]

Nicely explained. Simple!

[@dereton33]

Glad you liked it

[@sweet1.662]

Brilliant brilliant helpful video good man

[@dereton33]

No problem.

[@jessamygoddard4112]

Wonderful video! I actually know how to do this, but if I didn't your explanation would really help. Thankyou for sharing! Take care you and your wife! Xxx

[@dereton33]

Thanks Jessamy . Al and Jan.

[@yukrawly]

Hello and thanks for the vid. I was wondering as I'm cleaning the whole system I'm guessing I can do all the rads in one go, but should I use a half litre of cleaner per rad?ThanksJames

[@dereton33]

No just use the stated amount on the inhibitor bottle as they are all different.

[@williamholden7573]

Nice one mate.

[@miriampope9352]

Hi Al....pressure ok at 1.5.....boiler refuses to stay on for more than 25 seconds.....this problem has been occurring for several weeks...today I drained down and refilled due to a rad leak which was the actual rad too...any other ideas please Al.

[@WildPhotoShooter]

Great video, that filler gadget is a good tool to have.

[@dereton33]

It sure is!

[@savvageorge]

Great tip, I really love the eezyfill. Also if you turn on the mains water supply and put a bucket under the eezyfill you can use it to clean out the radiators without taking them off the wall.

[@dereton33]

Great tip thanks.

[@elgera2k]

Hello Dereton and thank you for your very useful videos. I am going to have to install a new boiler in my old 20year old system which had Fernox F1 put in about 5 years ago. Do I need to flash each radiator one by one before having the new boiler install or just add inhibitor and have the new boiler installed? There is a company I rang and they wanted to do a power flush (extra 500 pounds on top on the boiler and installation price) I will really appreciate your advice and thank again for all your good work here.

[@dereton33]

I would drain the fernox now, then add system cleaner then drain again just before the new boiler gets fitted.

[@SirSpuddy]

a other great vid as always

[@TM-xz3wj]

COYW

[@royshergold9346]

Handy bit of kit pays for its self, (not loosening fluid all the time).

[@dereton33]

Yes made for the job.

[@nomercyforthewicked]

Thanks for your lovely helpful videos , I've just got 2 questions , 1, after putting in the system cleaner and filing the rads up should you turn on the heating and for how long. And my 2nd question is , after 48 hours you drain the system and the refill and put in the inhibitor and should you switch on the heating for it to go around the system, and once again thanks for your time

[@dereton33]

Run the cleaner on and off for about an hour a day for two days. Once the inhibitor is in run it for an hour after that it will be well mixed and ready for normal use. IE run it means switching the heating on.

[@buxvan]

I use the towel rail if the customer has one. Rad valves off (if they're not the type that will start leaking as soon as you touch them !) Unscrew the bleed nipple a bit, if the water stops unscrew the bleed nipple plug, get your U Gauge tube & Syphon out enough system water for the chemicals, pour in the chemicals, screw rad plug back in. Open rad valves, bleed towel rail. All sorted.

[@dereton33]

Thanks for the info David.

[@mohammedakbar3477]

Once again thanks for your lovely job done..... great help

[@dereton33]

No problem.

[@Serel25]

Great vid, i always come to you for plumbing questions 😊... I have sludge in my downstairs radiators will this help or will it need professional power flushing?

[@dereton33]

No this should do the trick.

[@steves1460]

Perhaps a bit late now, but you could reverse flush it yourself using a hosepipe and keep going until the water runs clear. Another option is to use system cleaner which you run in the system for a few days and then drain it out and then put fresh water and inhibitor in its place. I am not aware that inhibitor can remove sludge from the system, but simply stop any new occurrence. How could it!? None of this is difficult to do and there are plenty of videos out there to help you. You really don’t want that sludge in system as it can stop radiators working properly and also it can block up the heat exchanger in your boiler and that is quite an expensive part to change. Most of the time the above methods will be sufficient to clear your problem and it certainly won’t do any harm.. Good luck and HTH

[@jibberjabber2957]

Excellent

[@dereton33]

Thank you so much 😀

[@deputyvanhalen6386]

Great job.

[@dereton33]

Thanks

[@mohamed-sr3il]

Hi, brilliant video! To the point and very clear. Learn a lot. Only one question: is there no need to refill/replace the water that was drained from the radiator? will the combi boiler system automatically replace drained water or it will require topping up? If so, how? Thanks.

[@dereton33]

No not that small amount, but you can check your pressure gauge and if it is below one bar you could always top it up to one and a half bar. Just use the filling loop to do this.

[@mohamed-sr3il]

@@dereton33 thanks

[@megaman2016]

Great video

[@dereton33]

No problem

[@sipapito]

I drained one radiator but I live in a condo complex I have no idea where these pressure valve is now the radiator is empty,help!

[@starbright1458]

Nice

[@alizcool1]

Hi Alan, My radiators are old and clogged up with ALOT of sludge. I cleaned one of them and decided they're not worth keeping. I'm going to change them all to new modern rads. I still want to clean all the sludge out of the pipes though. Do I put the new rads on first and then add cleaner and drain after a few days or do I clean the system first with the old rads on, drain and then install the new rads?

[@dereton33]

I would change the rads first, then put in the cleaner for the pipework, as a lot of sludge would come out when you drain it all down any way. The remainder would disperse when you add the cleaner.

[@snarskistomas]

Thank you!!!

[@dereton33]

No problem Thomas.

[@BoredinNewYork]

Hi, really useful video, thank you. How do I know if I need to add inhibitor? We had the system drained down a couple of months ago, but I don't know if any was put in when the system was repressurised. Thanks.

[@dereton33]

More than likely not, but if you are not sure, drain it out again and add some fresh yourself.

[@BoredinNewYork]

Thanks, if we assumed there wasn't any and I just added some fresh without draining down, would it be dangerous if there was actually some in there already?

[@BoredinNewYork]

The plumbers has now told me he didn't put any in, but the reason is it is an older system. He says if we add inhibitor it may cause leaks in the boiler and the existing pipework and radiators. Is that right?

[@zoesmith1536]

you are really good. thanks for the video. p

[@dereton33]

No problem.

[@JOXVOX]

hi, great vids, a question please, I have a combi boiler, they have fitted drain valves on all 5 radiators, I don't know which one is the best to drain down, what do you advise please, thank you

[@dereton33]

The one that is at the lowest point in your house.

[@johnbarnes4420]

This tool is excellent for reducing the water in the header tank ,just screw a 3/4x1/2 inch onto the overflow fitting and attach tool and empty water I’ve tried battery pump but they don’t last 5 minutes

[@LennyJohnson5]

Excellent film; would it be exactly the same process for adding a 'radleak' solution to a back-boiler sysytem? A heat exchanger is showing very early signs of leaking (a small slightly damp area on the join) and I'm trying to prolong the life for as long as possible. There is no secondary header tank. Thanks.

[@dereton33]

Don't bother that stuff will block up valves air valves and help sludge the system.

[@LennyJohnson5]

OK; cheers - thanks for the advice. Is there anything you'd advise, other than changing the boiler?

[@silverismoney]

If you have a pressurised system, is it 100% necessary to get it down to zero pressure like some people say ? that will take hours for me. I was planning to just drain 1 litre out of the rad fill up, and then top up the water if necessary. Thanks, and great video. Bought the same filling system.

[@dereton33]

That`s my fav gadget for filling through rads.

[@jnoonanuk]

Hi great video! Perfect for what I need. I'm replacing a radiator and need to add inhibitor, i was gonna add a 1 litre bottle? Us that too much, would 500ml be better? Can you add too much? How much is too much? Thanks 😊

[@dereton33]

If you are draining the complete system to change it then yes add the full bottle. If you are just draining the radiator then it depends how big the radiator is, but a small amount a third of a bottle if it is a really big radiator. Less if smaller. By the way you can overdose a system with too much.

[@jnoonanuk]

@@dereton33 Great thanks for your reply 👍😊

[@ipod1978]

Very good video. Does it matter what radiator you add inhibitor to with regards to distance of the water heater tank or would any radiator in the house be suitable to use? I ask as I’d like to do this myself although we have an open, gravity fed F+E System, paired with an upstairs heating tank yet downstairs bathroom married to an outside boiler (in the shed) where we recently had a new circulation pump fitted.. somewhat backwards I know. I am aware of adding inhibitor to the tank in the loft although this is generally not recommended but I would also like to remove any worry of leaks. Downstairs is tiled so much more forgiving.

[@dereton33]

Any rad in the house is fine.

[@ipod1978]

@@dereton33 Gentleman thank you

[@td2691]

A plumber is a problem solver, making one of these with a couple of plumbing parts and every day items surely would be quicker and at no cost as you will probably have everything you need. I'm thinking of a fizzy drinks bottle cut open at the base, turned upside down, maybe into a wall plate elbow, to copper then into male 1/2 inch or something similar. On an alternative subject what about a powerflush magnets. Length of soil stack, screw on top, blank on bottom, tank connectors in/out, bleed valve, official powerflush 12 inch magnet through top screw and for £70 Powerflush magnet, just as good as the 300£ ones.

[@truthseeker7794]

Washing up liquid bottle, just squirt it in job done. Or a funnel with a bit of flexible tube Been, doing it for years.

[@arahant69]

Seen x100 and x400 on ebay and wondering if the cleaner has to circulated in the system for a month before draining the system before adding x400 which is left in forever?Nice tip on the tool.

[@dereton33]

It should say on the bottle how long to leave it in for.

[@degooser2000]

Hi, How long do you leave the cleaner (Fernox F5) in the system before you drain it out and put in the system protector (Fernox F1)?

[@dereton33]

They all have varying times, it should be marked on the bottle, if not, it is usually 48 hours.

[@_J.F_]

If you have a Magnaclean filter, or similar sized filter installed, it is much easier to simply drain the filter, fill the inhibitor into the filter, and then open up the valves again, bleed the air from the filter and the job is done.

[@dereton33]

Good for those who have one.

[@davidweir3840]

Very helpful advice. Thankyou!

[@dereton33]

No problem.

[@AnonYMouse-ky4sg]

You're so nice. You remind me of Alfred.

[@dereton33]

Thanks. Alfred !!!

[@travelwell6049]

Thank you. I wish I felt more confident doing these things myself. So do you put the cleaner in and then inhibitor at a later date?

[@dereton33]

Yes and yes

[@dereton33]

But you do have to take the cleaner out before putting in the inhibitor.

[@johnshrimpton135]

Just found this video, ive got a static caravan which has antifreeze in the combi boiler system, can i also mix in inhibitor with the antifreeze?

[@dereton33]

Sorry I do not know on that one.

[@Mark-ij2nh]

I put all new radiators upstairs in 2 years ago then additional ones in 1 year ago so the system was flushed many times. I am putting my inhibitor fluid in a chrome towel radiator as the valves are on the top so i can just pour in with a jug

[@dereton33]

Yes best place to pour it in.

[@markthompson8511]

Great Hi very informative vid as usual I hope you can help me with this one I have a magnaclense flush and I’m fine with a combi setup but I have a problem with the instructions for vented system , it says to confirm 3 port valve is in manual which I presume is locking the leaver ? If no 3 port then install an isolation valve to the flow or return on the cylinder then drain down can you tell me why I need to isolate the cylinder Any help would be greatly appreciated many thx mark

[@dereton33]

Putting the 3 way valve in manual is locking the lever over. As it is an either flow or return, not both it will not isolate the cylinder.

[@markthompson8511]

@@dereton33 oh right thx for your info always very helpful are you in the kent area ?

[@dereton33]

No Devon.

[@tyronemckinson6205]

Your videos are very clear and easy to understand! you're a natural teacher.. Keep up the good work 👍

[@dereton33]

Thanks Tyrone.

[@rendog1781]

Hi mate, another informative video so thanks. Had a quick question, when i add inhibitor, is there a particular radiator that i should add it into such as a radiator downstairs in the lounge or one upstairs in a bedroom etc? Thanks again

[@dereton33]

Upstairs is a good one it then pumps straight down to the rest of the system.

[@rendog1781]

@@dereton33 great thanks

[@steves1460]

The cartridge guns are good for this job and much simpler to use, buut they are more pricey.

[@whitebear5405]

I live in a house 1 year old. How often would you suggest running cleaner through and how often to add inhibitor? Also can you mix inhibitors together?

[@dereton33]

Every 5 years and do not mix together.

[@drcl7429]

The only thing I would add is open the bleed valve when adding the product and it will go in quicker by allowing the air it is replacing to get out by another route.

[@dereton33]

Good idea thanks.

[@stevefrench8512]

My heating system was emptied many months ago, but no inhibitor was added when refilled. The system will be replaced in a few months. I can add some very easily via a bathroom towel radiator. Is there any point adding it now ?

[@dereton33]

No it`s not worth it now.

[@Chef1Mat]

hi, Mate. landlord is being really tight and won't powerflush the heating system. any other way to clean the system cheaply. my gas bill is rediculously high. Luton Bedfordshire

[@dereton33]

Add system cleaner, then follow up with inhibitor. Have a video on how to do it.

[@stevelc3153]

You`d need to ask your landlord, but take of the rads, individually, and flush them through outside, with a cold hose. wash out all the sludge. But make sure your rad valves work before you do that. then make sure you add fresh inhibitor when you refill the system.

[@leejamesroberts15]

Hi Derenton. When doing this would it be worth putting some anti-leak fluid in at the same time? I have a leak on one of my joints which I'll be changing out on weekend so emptying the system... I don't know the condition of all the other underfloor joints etc so want to be safe with some leak stop. Will it be ok to put the inhibitor and the leak seal in together at the same time?

[@dereton33]

Yes it will be fine.

[@leejamesroberts15]

dereton33 brilliant. Thank you buddy. Better safe than sorry! For £6 a bottle I will do it if I need it or not.

[@paulthomas3841]

A up, I have made 1 filler out of 28mm down to 22 mm then to 15mm compression nuts double endered

[@dereton33]

Great.

[@miriampope9352]

Hi..we have a Main 30 he....boiling stays on for 25 seconds then cuts out for approx 3 minutes then comes on for 25 seconds and repeat after repeat....rads upstairs are warmish but downstairs all cold..hot water ok....no flashing neons..any ideas please.

[@dereton33]

Check pressure is one and a half bars on gauge. Top up if necessary.

[@deborahmansfield2752]

I need to add Fernox F4 sealant as I may have a small leak. Would I do it in the same way? Drain system or radiator and add the same way. Thank you for your help.

[@dereton33]

Yes, absolutely

[@deborahmansfield2752]

@@dereton33 sorry I know I am asking again but to be clear do I drain 1 radiator or is it better to drain the system completely.

[@siyarahmad3591]

thanks really helpful for an apprentice starter like me.cheers

[@dereton33]

No problem.

[@nirlep001]

Hi, I have a pressurised system(I.E. have got a tank in the loft). Do i use the same system you showed in the Video or there is something else you suggest. Your help would be appreciated.

[@dereton33]

If you have an open vented system I.E a small tank in the loft, then that is where you pour in your inhibitor. You can of course still do it through the radiator if you want to.

[@nirlep001]

dereton33 I really appreciated your comment. Thanks

[@helenhanson5781]

Hi 😉 I have a new Ideal Logic C24 - I bought 3 new Vertical rads for downstairs - haven't fitted them yet - but the heating engineer who fitted the boiler, saw my new rads and said they might be too much, as vertical rads use more water. How do I tell? The Housing Association will love me if I blow their new boiler up! Lol! Upstairs there are 2 old single panel (convector?) both 600x1600, also 1 in box room, 600x1000. I bought a curved rad for bathroom also. Now I'm too scared to fit them. Vertical rads are - 3770 BTU - 2095 BTU - 2871 BTU. Thanks. 🤗

[@dereton33]

Do not let your engineer scare you, it will be fine, fit them. What he was referring to was that the boiler may be a bit stretched. It will be fine though.

[@helenhanson5781]

@@dereton33 Thank you so much for your prompt reply, ♥️ I have googled, but can't find an answer. I don't use much hot water, living alone. They send someone out to inspect work that's been done, I have postponed it, in case I get in to trouble 🙄 Lol! Do they add up all the rads KW? How DO they work it out then? 🤔 Many Thanks. x

[@dereton33]

There is a formula for working it out.

[@indianatone218]

Where does all the rust and crud end up is there a filter on the boiler that traps it all like a fuel filter on a car and you Change it .? I know the radiators can hold the crud at the bottom thanks in advance .

[@dereton33]

There is no filter, that`s why you have to flush your system out every so often.

[@indianatone218]

thanks .it would be a good idea to have some sort of water filter trap

[@piee683]

Hi,how would you put inhibito into a system that only has single rads where the bleed valve is against the wall thx

[@dereton33]

Ahh yes I know the type, the answer is, you will not be able to. You will have to drain some of the system and disconnect the flow or return pipe somewhere convenient and add the inhibitor there.

[@piee683]

Thx for the speedy reply,can I ask one more question.is it OK to install a second hand hot water cylinder,the one in question is only 2 years old and had to be replaced with a twin coil indirect cylinder,it's in perfect condition and the reason I want to fit it in my mums is because it's insulated,

[@Ppp-kk6hw]

I have a Worcestershire combi boiler and I have to fill it's up to 1 and half bar every couple of days.. I've checked for leaks and cannot see any . Any ideas

[@dereton33]

Check the pipe outside in case the PRV is letting by. If not, you still have a leak somewhere.

[@PeterGaunt]

Thank you for this. One question - give me an idea about how long it takes to drain a radiator in the way that you did? Also, it strikes me that you only need to drain it to just below the bolt you took out to stick the funnel in.

[@dereton33]

It takes up to an hour if you have a large radiator to empty, You will need to empty the rad enough to add your inhibitor, unless you are just putting in auto air valves.

[@mesterraveykev6751]

Hi Alan - Is this method ok for a vented F&E system ? - Im thinking isolate valves on a towel rail , syphon out say 500ml water from bleed plug on the top of towel rail - then add 500ml of inhibitor. Replace bleed plug and turn valves back on and then re-check to see if bleeding is necessary ? Thanks in advance

[@dereton33]

Yes that is fine.

[@mesterraveykev6751]

@@dereton33 Brill Alan - thanks very much for confirming

[@alibeautiful5310]

Hi . I have 5 Raditiors in my house I want to put inhibitior in Radiator. Do I have to drain all five Radiator first then put inhibitior in five Radiators or just drain only one any Radiator and put inhibitior? My bolier is upstair in bed room. Can u please explain to me please.

[@dereton33]

Just drain one radiator as shown in the video.

[@gilbertlufc]

Hi Al. I have a problem I'm hoping you can help with. I've fitted a new small (400 x 500 single panel) radiator in a downstairs lav. It has a TRV on the right as I look at it from the front, and a lock shield on the other end. The rad is coupled to those by telescopic tails both ends because I had to buy a smaller rad size to the previous one. I've connected the new rad up and turned on the heat but it's not getting hot. The pipe and tail at the TRV end are red hot but the rad itself not. At the lock shield end, there's not much heat at all in the pipe or the tail. I've gone through the usual . . . bled the rad, had the TRV head off, uncoupled the tails and checked the flow at both ends, bled all other rads etc, and all is ok. Every other rad in the house is red hot. I've changed many of these in the house before without this issue. Any idea what I can try next? Is it a case of balancing up? Any advice very gratefully received.

[@dereton33]

Turn every rad in the house off, except that one, when it gets hot turn the others back on.

[@gilbertlufc]

@@dereton33 Thanks a ton Al. I've done that this morning and we're good to go again. The cold brand new radiator did take a long time to get hot but that could've been because I forgot to shut off the small rad in the airing cupboard which was put there when the tank was removed (it was open half a turn). Once I did that, the cold rad in the downstairs lav slowly started to heat up. There are 16 various size radiators on our system driven by a fairly new Worcester Bosch CDI 42 so I expect it takes a while for the heat to be distributed, right? Thanks again mate.

[@Paulmaddison2012]

Dereton when changing a 3 port valve do you need to move the spring loaded arm to let the coil drain or will the coil drain without touching any controls. many thanks

[@dereton33]

+paul maddison . Yes, pull the lever to the manual position when draining and filling back up.

[@Paulmaddison2012]

many thanks your a diamond.

[@cliffcarlo180]

You're even lol

[@dalriada842]

Great device! I always end up spilling inhibitor too. Do you know what size the o-rings are in the release valve, and end cap? I have a radiator off at the moment, for decorating. The o-rings look as if they would benefit from being replaced. Is it safe to remove a radiator completely with water in the rest of the system? I trust the lock shield valve, but I'm suspicious of the temperature controlled valve. Especially since I need to remove the top to get proper access to the nut. I always drain the system down when I'm taking a radiator off. This means I've bought a fair number of bottles of inhibitor over the years!

[@dereton33]

The o rings are 15 mm, it is quite safe to remove a radiator by just shutting the valves either end off.

[@kenew]

Can you do this if you have gas heating thanks

[@dereton33]

Yes.

[@Mark-ij2nh]

Dereton i changed all my eubbish single rads to doubles in 2018 and 2019 so they are fairly new so i shouldn't need a cleaner should i as i drained the system many times. So is jyst a bottle of inhibitor enough as i only have 8 rads in the house.

[@dereton33]

Yes should be ok.

[@Mark-ij2nh]

@@dereton33 Thanks mate for an electrician im not a bad plumber 😁

[@steveprice9462]

Hi Al, how would I know if I have inhibitor in my system already. Thanks.

[@dereton33]

If you drain a small amount of water out it should look clear.