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expansion vessel

  1. T

    Replacing expansion vessel on a unvented hot water only storage system (package type)

    Hi, I have a failed expansion tank (which is full of water and has 0 bar pressure) on my unvented hot water storage system. Currently the pressure relief valve is venting water to the overflow. This diagram matches what I have: I want to try and do the job myself if possible but it seems...
    • thebigred
    • Thread
    • expansion expansion vessel hot water replacing system unvented vessel water
    • Replies: 15
    • Forum: Central Heating Forum
  2. M

    External Expansion vessel

    I'm wondering if there is a slimline alternative to the football sized 'Robokit'. Say something like the rectangular Vaillant or Baxi ones. The question would be how to securely mount it.
    • mountainman
    • Thread
    • expansion expansion vessel vessel
    • Replies: 3
    • Forum: Central Heating Forum
  3. C

    Baxi combi instant expansion vessel problems

    Hi fellas, could do with a bit of tech knowledge, went to a job today , boiler leaking water , found expansion vessel had blown and rusted round seam .Took boiler off wall and removed vessel. Found it had two ports on it ,both 3/4 . Tried to get through to Baxi tech help to no avail. Capped off...
    • Chris Bathroom
    • Thread
    • baxi combi expansion expansion vessel vessel
    • Replies: 1
    • Forum: Central Heating Forum
  4. I

    What is the normal pressure in an expansion vessel? - Will 4psi make old TRV's leak

    Hi Can anyone tell me what sort of pressure an expansion vessel normally runs at, on a normal GCH system, when it is heating I've just put an 18 litre expansion vessel as a temporary replacement for a first floor open header tank, to see what happens if the system is run at pressure. I've...
    • interesting100
    • Thread
    • expansion expansion vessel leak pressure vessel
    • Replies: 15
    • Forum: Central Heating Forum
  5. I

    Can you put Expansion vessel in the same location as previous open ventd header tank

    I have a header tank at ceiling height on the first floor and we want to put rads on the 2nd floor above the header. - It would be v. difficult to raise the header tank Is there any reason why you can't put an expansion vessel in the same place as the existing header tank, so it replaces...
    • interesting100
    • Thread
    • expansion expansion vessel tank vessel
    • Replies: 16
    • Forum: Central Heating Forum
  6. S

    determining size of water expansion vessel

    how do you determine what size of expansion vessel is needed for each job? Also, how do you decide what size of radiator is needed for a particular room? thanks in advance
    • shezzaar
    • Thread
    • expansion expansion vessel size vessel water
    • Replies: 2
    • Forum: Central Heating Forum
  7. M

    Expansion vessel deflated.

    i was called to an alpha cb50 today. The pressure had been gradually decreasing and all of a sudden it became faster. I check the prv pipe and it had was not dripping but water was in the pipe and a little wet patch on the floor. So get to the expansion vessel and no charge what so ever. So i...
  8. M

    gledhill cb 35 expansion vessel part number??

    does anyone know the part number for the expansion vessel and pipe for this shed of a boiler as i cant find it any where!! gc 47-317-01....can't even ring their tech line as my mobile wont allow calls to a premium number....gledhill are poo
  9. M

    Composite valve for expansion vessel

    Hi, Do they make a composite valve arrangement that includes the expansion valve and filling loop. (Not including the pressure relief valve) So this can be positioned on the return of the system. And the pressure relief on the flow.
  10. 5

    External expansion vessel.

    Well, I have to go back to a heating job where the boiler expansion vessel needs changing,. For a number of reasons I intend fitting an external one. I am going to put it below the boiler using a half inch to 15mm adaptor, to 15mm then to a flexible hose to connect to the return to the boiler...
  11. A

    Potterton promax system 24 he plus expansion vessel. Can I recharge?

    Hello, My boiler has started to lose pressure. I placed a bag over the pressure release valve drain and then pressurised system to 2 bar with the heating off. It remained steady and didn't lose pressure. I then switched the heating on and watched the pressure. It gradually increased to 3 bar...
    • ashy
    • Thread
    • expansion expansion vessel plus potterton system vessel
    • Replies: 4
    • Forum: Central Heating Forum
  12. X

    New Boiler & Expansion vessel - red needle very high

    I'll post the cliffnotes before as it turned into a somewhat long post: * boiler died end of last year * housing had everything replaced (regular boiler) this time last month (January). Baxi Solo 15HE installed. * red expansion vessle/tank fitted (attic expansion tank shut off i think??) *...
    • Xad
    • Thread
    • boiler expansion expansion vessel high new boiler vessel
    • Replies: 9
    • Forum: Boiler Advice Forum
  13. R

    Dripping Tundish...Closed Unvented System...Depressurised Expansion Vessel.

    Hi all, bit of a novice on this but here goes. I have noticed that the Tundish is dripping constantly alongside my Tribune HE cylinder. The Central Heating and Hot Water system are working fine it appears. There are two expansion vessels above the cylinder one small red one with the pressure...
    • rosstheboss1972
    • Thread
    • expansion expansion vessel system unvented vessel
    • Replies: 2
    • Forum: Central Heating Forum
  14. S

    Vokera Linea 730 pump / expansion vessel

    Hi I have a Linea 730 Vokera boiler that has code 4 on the display (low pressure). When I top up the pressure water leaks from the top of the external brass part on the pump next to the hose leading to the expantion vessel. For the last few weeks the pressure has read 0 yet the system has...
    • Stew C
    • Thread
    • expansion expansion vessel pump vessel vokera
    • Replies: 4
    • Forum: Central Heating Forum
  15. P

    Expansion vessel

    Hello i repressurised my expansion vessel with water to 1.5 bar heating put on this evening the gauge is going up to 3 how do I reduce the pressure as I am a bit concerned it is to high, is it just a case of bleeding a radiator to let out water? Tim
    • Puttmeister
    • Thread
    • expansion expansion vessel vessel
    • Replies: 17
    • Forum: Central Heating Forum
  16. P

    Expansion vessel

    Hello, from a new member i have a new build property, the ch system has an expansion tank on the top of the water cylinder I have a few questions 1. When the system is off the gauge says 0 is that right? 2 when the system is on it only reads .5 as a maximum pressure 3. I need to refill the...
    • Puttmeister
    • Thread
    • expansion expansion vessel vessel
    • Replies: 3
    • Forum: Central Heating Forum
  17. A

    expansion vessel on central heating

    hi guys. This is maybr a sizing issue but thought i would put it to others to get a second opinion. Went to service a boiler the other day then afterwards noticed that the water pressure was down to almost zero (sealed system) i repressurized and checked all rads were bled . All fine. left...
  18. N

    Replacement of Expansion Vessel on Baxi 105e Instant (Stockport)

    As above really. Vessel is leaking. Have had one quote stating boiler must come off with a suitably high number attached followed by a suggestion that it might be better just to fit a new boiler. Have also seen 2 plumbers of this parish say that its not that bad and can be done in situ in 2-3...
    • notsofast
    • Thread
    • baxi expansion expansion vessel replacement vessel
    • Replies: 7
    • Forum: Central Heating Forum
  19. J

    Should annual boiler service include checking the expansion vessel?

    Hi all, I've got an Ideal Response boiler, about 10 years old. I tried a search on the forums (and google) but haven't found an answer to my question. It's been in contract with British Gas Home Care for much of that time, and over that time I've twice had them out due to faults that turned...
    • jogu
    • Thread
    • boiler expansion expansion vessel service vessel
    • Replies: 33
    • Forum: Boiler Advice Forum
  20. L

    Unvented Expansion Vessel

    Hi I went to a job to change a zone valve but noticed that the htg pressure vessel was on the flow after the zone valve. The system has twin zones plus hot water , should i change it and put it on the return? I know it will probably be fine but abit worried if they turn off all the rads and...
    • leakeee
    • Thread
    • expansion expansion vessel unvented vessel
    • Replies: 1
    • Forum: Central Heating Forum

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