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vessel

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  1. G

    Cold water expansion vessel failure

    The cold water expansion vessel (24l) of a three-year-old system has failed and my plumber says that it must be because it was too small for the 300l hot water tank and proposes to instal an additional vessel for safety (as well as replacing the failed vessel). The manufacturers (Geminox) say...
    • GabiW14
    • Thread
    • cold expansion expansion vessel vessel water
    • Replies: 5
    • Forum: Central Heating Forum
  2. jaydebruyne

    System pressure / expansion vessel

    Quick question, Went to a leak, found it coming from a PRV from an ideal combi boiler. Checked the pressure and it was at 3bar. Someone had left the filling loop open. Released some pressure and tested the heating and within 5 mins the pressure goes to 3.5 bar. Am I looking at either a...
  3. C

    WB greenstar expansion vessel

    Can anyone offer me some help please i have followed the correct procedure to recharge expansion vessel on my WB when i try to re charge the EV the pressure on my pump shoots up to 2.5 bar and shows lots of resistance leading me to think that its not charging the vessel can anyone offer...
  4. R

    System boiler pressure problems - expansion vessel?

    Hi there I have a Worcester Bosch Greenstar system boiler. On turning on the central heating this week I noted the pressure was a little below 1 bar so I topped it up to the 1 bar mark. Fired up the heating again and noted later that the pressure gauge was well into the red - around 3 bar...
    • RVS6
    • Thread
    • boiler expansion expansion vessel pressure system vessel
    • Replies: 4
    • Forum: Boilers
  5. Captain.rick

    Expansion vessel change vaillant ecotech 824

    Hey all, got to change expansion vessel on above boiler monday is there any tips any tips or anything i need to be careful of/watch out for? i got a new prv too i noticed the foam sound insulation is falling to pieces in there too, any ideas why? thanks for looking and any advice in advance
  6. P

    Setting Expansion Vessel

    Hi looking for a bit off advice. Doing a commercial premises.Closed system for the heating.Ive set the press unit at 1.2 but not too sure about the expansion vessel? Also a booster set for the cold mains which is set at 1.5 bar with a remote expansion vessel.What should this be set too as...
    • Paul Turton
    • Thread
    • expansion expansion vessel vessel
    • Replies: 8
    • Forum: Central Heating Forum
  7. 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...
  8. 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
  9. 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...
  10. 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
  11. 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
  12. 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...
  13. 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
  14. 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
  15. 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...
  16. 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...
  17. 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: Boilers
  18. 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
  19. J

    potterton power max he pressure vessel

    Hi all, I'm new here so hear goes. I have a potterton power max he, I've had some Ch pressure issues which I traced to a faulty pressure relief valve Which is now on order but when I went to check the pressure vessel's the external one was ok but when I put the Pump/gauge on the primary...
  20. 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: Boilers
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