How to fit an expansion vessel
292,632
Publicado 2010-11-15
You can use solder ring fittings or end feed fittings if you prefer them to compression fittings.
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• compression fittings
How to re-charge an expansion vessel is here-
• How to recharge an expansion vessel i...
To check if the expansion vessel requires re-charging please watch this video-
• How to check an expansion vessel
After you have re-charged the expansion vessel you may need to re-pressurise the boiler- • How to repressurise or fill a combi b...
Then you might have to bleed the radiators - • How to bleed a radiator
Todos los comentarios (21)
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A sensible and straightforward guide. Thanks. And will idiots please stop saying " leave it to the "professional" a) This is not anything to do with the "Gas" side - its a plumbing job b). If you were going to pay a man, you wouldn't be looking here, so a helpful video is a boon. c). I've seen many complete bodges done by "professionals in my lifetime - I do it myself often cos I want it done right. If it's a Corgi job, then I pay the Corgi [I know ,Gassafe] ,man.
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ONE OF THE BEST VIDEOS POSTED , FROM START TO FINSIH , I ONLY WISH ACTUAL PLUMBERS COULD BE AS HEPLFUL , GREAT JOB 5 STARS
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I had this done by a central heating engineer 2 years ago ...it is working very well ...saves me climbing up to the loft to keep topping up the pressure. I can recommend it.
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+Nunsweepit421 Please ask here- www.ultimatehandyman.co.uk/forum1/central-heating-… I'm not sure how the size of expansion vessel is calculated.
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Your expertise and time is much appreciated. The radiators are all full and I checked under the house (Mobile home) and no leaks. Usually when I fill a bath with the water temperature set high it drains the pressure down to nothing, but doing the washing up with temp low doesn't affect it. I will try what you advised. Thanks so much.
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I guess that makes sense and can see how the new one takes over, thanks for the insight. The problem I have is that my system doesn't always loose pressure when I fire up the hot water, only sometimes. Will the fitting of an external vessel still fix it in this case?
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This is a great video thanks 1q can I fit the vessel above the boiler or does it have to be below thanks
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Excellent video, gave me the confidence to do it myself, Plumber wanted a fortune to do it, parts are cheap and works a treat.
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You doing really good job to share all your experience :) I am planning to install external same expansion vessel like boiler has already, but just wonder if I could connect to the same plastic manifold where PRV and flexible pump hose is connected? Just disconnect old EV and with extra piping and few elbows connect new external EV? Or just leave it old one as it is and install new external EV to the return side as you saying in this video?
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Thanks, I'll give that a go. I wonder why when I keep losing pressure on a random day and I refill through the filling loop, where does all the extra water go if it's the air that is being lost?
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excellent video, very professional and clear! :)
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Thanks. I checked the valve, I pressed lightly & no water came through (however the valve is at the very top of the vessel), but the air pressure was down to nothing. I put 1 bar into it, which forced the CH pressure back up, but when I took off the pump, air was leaking out of the valve, until I put the cap back on. Can I assume that this leaking valve is the problem why I keep losing pressure and have to keep filling from the loop every now and then? Thanks very much for your help!
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Fantastic video ,great .
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Thanks, I did think of this myself, but before doing it, I let the rest of the air out to test that no water leaked out, then repressurized and squirted WD40 over the valve while it was hissing, and it seemed to stop leaking air. Not sure if the WD40 just deadened the sound but the valve did seem temperamental, I guess time will tell. I will try the PTFE if it fails again. Thanks for helping me understand how it works so I could try this, I hate to throw so much money at a repair man!
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difficult to see, i assume its on the shrider but as it at the back of an alpha 240 and only leaks when the heating is on i think the diaphram is leaking with expansion, very slight as pressure is not lost on just dom. h.w, also the drips can be seen dropping from the back casing dolphin
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Another excellent instruction video. Many many thanks, this is going to save me £2k quoted to get a new boiler fitted. Very sensibility advice, shame some of the audience are ill informed jobsworth trolls.
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This is extremely useful, I have a question that I hope you can help me with, I'm hopefully going to avoid cutting in a t piece by finding one of those valves with the 2 openings, the question I have is is the pipe with the valve that the filing loop attaches to always the return pipe? Thanks. I was thinking if I could use one of these double valves then I could always remove external expansion if I needed to.
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Thanks so much for this! Can I just ask what happens to the original faulty expansion vessel? If the diaphragm is knackered and you fit a new external, how does this work if the original is still in place? Sorry if I'm being a bit thick about how it works
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Hi mate, great informative posting. Can you clear up a few questions? I have a worcester bosch junior 28i combi. The expansion vessel has been disgnosed as faulty along with the PRV. If I fit a secondary vessel as per the video, do I need to remove the existing one and how would the pressure release valve work on the new vessel. I was quoted £1700 for a new boiler so I would like to have a go at this before the new boiler option. Cheers
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i would be isolating the existing expansion vessel completely fron the boiler ? just leaving it in place ? replacing the system with an external expansion vessel immediately outside the boiler?
