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vessel

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  1. 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
  2. S

    Looking to replace expansion vessel on Worcester 28i Jr. combi boiler

    Hi, my boiler's pressure keeps dropping within few hours. No dripping or leaks detected. A gas safe engineer suggested to change the expansion vessel. Would like to do it ASAP. Please give me a good quote. Thanks. I'm at NW6 London.
    • SGman
    • Thread
    • boiler combi combi boiler expansion expansion vessel replace vessel worcester
    • Replies: 0
    • Forum: Boilers
  3. 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
  4. 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...
  5. 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
  6. 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
  7. 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...
  8. 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...
    • steve1
    • Thread
    • boiler pressure vessel
    • Replies: 8
    • Forum: Boilers
  9. G

    Expansion vessel sizing

    I might be fitting a logic+ 18kw system boiler in a town house with newish single panel rads. I was told years ago that system boilers etc with internal expansion tank are sized correctly for their output kw. Anyone have a technique for getting this right. I seem to remember calculating...
  10. J

    Unvented Cynlinder Expansion Vessel Full of Water

    Hi, Before I start excuse my ignorace in all matters relating to plumbing, I shall try and explain what the issue is. I have a tribune unvented water cylinder with an expansion vessel (13 litres i think). The steel clamp (hose clamp) has snapped and the vessel has come crashing to the...
    • jutting
    • Thread
    • expansion expansion vessel unvented vessel water
    • Replies: 1
    • Forum: Central Heating Forum
  11. S

    Expansion vessel size large system

    Have seen many differing formulas for this. My system volume is 1417 litres My static head is 11 metres PRV set at three bar One calculation I found said it should be 145 litres... can you imagine? Another said 50, which seems more realistic! Cheers
    • slide
    • Thread
    • expansion expansion vessel size system vessel
    • Replies: 13
    • Forum: Central Heating Forum
  12. M

    Square hot water vessel?

    Hi Been asked to change an immersion on this cylinder (well it's not a cylinder as such as it's not cylindrical!!!) it's encased in insulation and a hardboard case!!! It looks like some sort of combination unit as there is a warning pipe and cold feed on the top- anyone come across these before...
  13. F

    Shock arrester or mini expansion vessel

    Fitted a baxi duo tec last week , and the hot water cycle starts , as the cold water is used, spoke to baxi and they said , I need to fit a shock arrester/mini expansion vessel , baxi say this is becoming really common , it's never happened to me before , can this be fitted anywhere on the cold...
  14. C

    Expansion vessel

    Went to a job today to replace a 12ltr expansion vessel on an unvented cylinder. The bladder had burst and the vessel had filled with water, not too bad......unfortunately the person who installed it used the pig tail plasterboard fixings and it came away from the pipework flooding the house! 2...
    • Ch4 plumbing
    • Thread
    • expansion expansion vessel vessel
    • Replies: 17
    • Forum: Central Heating Forum
  15. G

    external expansion vessel on combi

    Hi all i am going fit a external expansion vessel for a combi . The current one is split on hermann icon 23t so i am going to cap it and fit a 12 litre external expansion on the return . The question is will the boiler be ok in hot water or will it over presurise during dhw operation due to...
    • gizmolang
    • Thread
    • combi expansion expansion vessel vessel
    • Replies: 14
    • Forum: Central Heating Forum
  16. C

    Expansion vessel on unvented system is hissing

    I have an unvented system in my home. The fitters that installed it recently came back to replace the expansion vessel as it kept hissing. They said it was a fault with the seal on the expansion vessel. Unfortunately, the new expansion vessel is still hissing. It sound like boiled water...
    • CNelson
    • Thread
    • expansion expansion vessel system unvented vessel
    • Replies: 28
    • Forum: Central Heating Forum
  17. B

    DHW Cylinder Expansion Vessel Pre-Charge

    Hi guys I have a quick question regarding the correct pre-charge pressure for an expansion vessel (24 ltr) on the cold supply of a DHW cylinder (300 ltr). As measured after a combined 3 bar PRV + 6 bar safety relief valve assembly, the static pressure of the cold supply is 2.5 bar. The...
    • belfastbob
    • Thread
    • cylinder expansion expansion vessel vessel
    • Replies: 7
    • Forum: Central Heating Forum
  18. M

    Worcester Heatslave 20/25 heating cutting out - extra expansion vessel??

    Hi there, we've had a 20/25 second hand boiler installed, replacing a very old 20/25. The heating cuts out and diverter goes to hot water and stays there, pump stops. I've noticed this can happen after the washing machine fills - the cold inlet tees off very near the boiler mains inlet. I...
    • mchandler
    • Thread
    • expansion expansion vessel heating vessel worcester
    • Replies: 11
    • Forum: Central Heating Forum
  19. M

    Best tool / gizmo for pressure vessel inflating?

    I'm sure this has been asked before so if so please direct me to the thread. What do you guys find best to re-inflate pressure vessels? I have a small compressor with a standard tyre inflator (PCL). I find it nearly impossible to get this down the back of boilers, especially when no clearance...
  20. J

    Zilmet 300lts Expansion vessel - air leak - faulty weld?

    Hi, I have a 300lt (yes its about 5ft high, 2ft wide) expansion vessel that assists in maintaining our cold water pressure during high demands (3 story 5 showers). It has been working well over the last few years but recently the air pressure has dropped. I have found the leak, it is the top...
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