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vessel

  1. M

    Calculating pre-charge in CW expansion vessel..

    Anybody have a good way to calculate this please? Cold water expansion vessel on an unvented. Vessel is not ruptured, PRV is OK but every now and again it drips a bit. I suspect the vessel pressure is too high for the system...
  2. jaydebruyne

    External Vessel with Combi

    I'm fitting an external vessel on a combi system whose vessel is defective. Leaving in the old vessel inside the combi as I'd have to take the boiler off the wall to replace it. The external vessel just goes on the return pipe as close as poss to the boiler, doesn't it? Cheers Jay
  3. G

    External Expansion Vessel

    A few questions relating to fitting an external EV on a system where a combi boiler's one has failed and cannot be accessed without removing the entire boiler. 1- Any brands that's recommended or one's that I should avoid? 2- Some EV kits come with a PRV & gauge. Is it necessary to install...
  4. M

    Ferroli optimax he plus 31c expansion vessel

    hi everyone, I have just joined, so apologies if this has been asked before. pressure keeps dropping to zero. When at zero there is no pressure on the expansion vessel,which should be at 1 bar, it looks like the only way to replace this is to remove the boiler completely. can I just tee into ch...
    • Myquantum
    • Thread
    • expansion expansion vessel ferroli plus vessel
    • Replies: 2
    • Forum: Central Heating Forum
  5. M

    Service expansion vessel

    Anyone know how to service one other than check the pressure and top up if required? A client has had a Legionella inspection carried out and has said that the hot water system should have the vessel serviced, mentioned something about bacteria growing in it. Would taking it out fiushing it...
    • MOSSEP
    • Thread
    • expansion expansion vessel service vessel
    • Replies: 15
    • Forum: Central Heating Forum
  6. rpm

    Pressure vessel?

    Evening, Am I right in thinking that the Grey cylinder to the back left of the photo is a pressure vessel. I found it today and when the main water iso valve is opened I can hear a hissing noise, I also noted rust around the centre seam. I`m not touching it as I was there to service the sani on...
  7. F

    Vessel

    Just wondering, I have a spare 18l potable vessel, can I use this for heating?? i wouldn't do it the other way but surely I don't see why you can't. Just seeing what your thoughts are?? cheers
  8. U

    Expansion vessel

    Hi all. This is my first post, so I hope I've done it correctly... I have a Telford Tornado s/s cylinder with an integral expansion vessel. The vessel has filled with water and has now started to leak. ( I was under the impression, that it should only be filled with air !!) When it was...
    • Unregistered
    • Thread
    • expansion expansion vessel vessel
    • Replies: 1
    • Forum: Central Heating Forum
  9. P

    Correct expansion vessel pressure?

    Hi, A few days I got my crappy Ideal boiler replaced by a Viessmann Vitodens 100 16kw boiler (heat only) and couldn't be happier....the Viessmann is super quiet (just a gentle hum) and it heats up water super fast. I have a question regarding the external expansion vessels i have upstairs...
  10. J

    No pressure in expansion vessel

    Help Please. We moved in to new (renovated) house few weeks ago .... The Santon Premier Plus unvented system, was installed about 3 years ago. just discovered there is no pressure in the expansion vessel. Zero pressure when I put a tyre pressure gauge on the Schafer valve. Tried to pressure...
  11. T

    Boiler locking out after expansion vessel change

    This might be total coincidence, but I serviced a boiler (ferroli) a few weeks back and fitted an external exp vessel a few days later (the internal one was knackered and it was about 1/3rd the price to fit external). Got a call from the customer and he says that the boiler locks out every...
    • thorn
    • Thread
    • boiler expansion expansion vessel vessel
    • Replies: 5
    • Forum: Boiler Advice Forum
  12. E

    System drained, expansion vessel showing 1.5bar?

    We had a new boiler fitted in a new location a few months ago, and we're currently in the process of fitting new valves and TRV's to the radiators as they're dripping slightly, and we want some new TRVs anyway. When the plumbers came, they fit an expansion vessel in the loft, to replace the old...
    • Evostance
    • Thread
    • expansion expansion vessel system vessel
    • Replies: 14
    • Forum: Central Heating Forum
  13. M

    boiler expansion vessel help

    Hi guys new here. Ring the landlord to fix the boiler and he thinks its the expansion vessel, the bar goes from 1 to 3 in under 15mins and it never used to do that also cuts out randomly ( other times it just stays on working normally but with the pressure on 3 bar.) Now the problem is he...
    • marc110
    • Thread
    • boiler expansion expansion vessel vessel
    • Replies: 11
    • Forum: Boiler Advice Forum
  14. B

    Advice on replacing a leaky expansion vessel

    Hello All. I have a Varem expansion vessel that is leaking: I had the system installed 7 years ago with a solar ready megaflow cylinder, ready to have solar thermal installed when we could afford it. We never bothered (got solar PV and solar iboost) The I suspect that the vessel is...
    • BogBeast
    • Thread
    • expansion expansion vessel replacing vessel
    • Replies: 1
    • Forum: Central Heating Forum
  15. R

    Expansion vessel

    Friends Just had an email with these pics. The chap says the white expansion vessel is leaking & wants it replaced. Any thoughts?[ IMG]http://tapatalk.imageshack.com/v2/15/01/10/31ba57ad938d03a3ca80e5481ed45bff.jpg[/IMG] Cheers Rct
  16. paulusgg

    Expansion vessel position on unvented installation

    Hi everyone, I'm new to the forum and at the moment I can't find an answer to a problem I have. I fit a lot of unvented cylinders for a loft conversion company (I'm G3 competent) as very often they need to see the storage tanks gone from the loft. The question for you lot is "is it acceptable...
  17. B

    expansion vessel

    anyone ever had this https://www.youtube.com/watch?v=zZg7MDp06dI&feature=player_detailpage
    • buckley plumb
    • Thread
    • expansion expansion vessel vessel
    • Replies: 3
    • Forum: Central Heating Forum
  18. B

    Leaking Expansion Vessel on BAXI 105e

    BAXI 105e - 10 years old Hi, all. First post so apologies if its in wrong place or well covered. After two days of searching forums I'm confused. Water appears to leak from somewhere around the bottom of the EV when central heating is switched on. It only starts leaking when the water temp...
    • belfastjohn
    • Thread
    • baxi expansion expansion vessel leaking vessel
    • Replies: 4
    • Forum: Central Heating Forum
  19. F

    Pressure vessel yes or no ?

    Hi all.. I've been asked to look at a large heating system - 30+ rads 20 rooms 4 inch CS pipe from boiler ! so i've been looking round the house with the new owners looking for a "fill point" and more to the point a large pressure vessel which there wasn't one apparent ? Am i looking for...
  20. S

    Pressure vessel on warmflow boiler?

    We have a warmflow boiler, since having the UFH installed, ( approx 36 sq mtrs in floor area ), we have noticed the pressure of the boiler dropping, but when it's topped up to about 1.5 bar and the heating system switched on it goes quite high and sometimes starts venting out the relief valve...

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