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expansion

  1. R

    Central heating header tank expansion overflow

    Evening all Had a call out today from a care home, hot water coming out of overflow. It was from the f&e header central heating. I removed the lid and found the level was high and Expansion was overflowing into the tank. The heating was on the rads were working fine and hot water was also...
    • robo1889
    • Thread
    • central central heating expansion heating overflow tank
    • Replies: 2
    • Forum: Central Heating Forum
  2. T

    Expansion tanks - background info

    Hi all - Apologies for intruding, but I was curious if you wouldn't mind helping me better understand the use and preferences related to expansion tanks/vessels in your area. I'm tasked with learning how they compare to use in the United States. - Are expansion tanks common in your area? Will...
    • TaylorBL
    • Thread
    • expansion
    • Replies: 12
    • Forum: Renewables
  3. W

    Worcester 25si expansion vessel removal and replacement

    Hi all, Ive got a job on to replace the expansion vessel on a 25si Worcester. Customer has test the valve and water is present. Without seeing that particular boiler model in a while can anyone recall if the thing can be removed without removing the flu that he said runs directly over and out...
    • wuzdirt
    • Thread
    • expansion expansion vessel replacement vessel worcester
    • Replies: 2
    • Forum: Central Heating Forum
  4. martind

    Expansion vessel - water O/flow problem (pic)

    After filling the expansion vessel to the specified pressure, water starts to come out of the over flow pipe. Does anyone know what the cause is?
  5. I

    Qualified G3 Plumber to Replace/Repair Expansion vessel ,Harrow area

    Hi Am looking to service or change expansion vessel as it is full of water. Connected next to Pressurized water tank. Live in the Harrow area Can you PM or reply if you are interested in the Job and if can provide estimate with parts and labour or Labour only ... Cheers Indi
  6. bright spark

    Sizing expansion vessels

    Lads which calculation do you use to size expansion vessels on jobs. I have to confess if I'm in a hurry I'll go with 1 litre vessel per kw of boiler. It's just that I go to so may domestic system boilers where only it's internal vessel is installed, at correct air pressure but there's a wide...
  7. R

    DHW cylinders - internal versus external expansion pressure vessel

    Anyone got any views on whether a DHW cylinder having an internal expansion 'bubble' e.g. TribuneXe is better or worse than having a cylinder with an external expansion tank e.g RM Prestel. It strikes me that if there is air in the new water entering the cylinder, it will rise up to the...
  8. woodsy

    Popped new expansion vessel

    Went to a job yesterday on a Biasi with a leak which turned out to be the expansion vessel. Ordered a new one, fitted it and started to fill and the new one popped too which freaked me out. Prv appears to be lifting which was my first thought but just wondering if anyone has had this before and...
  9. F

    Open vented system,advised to cap off expansion pipe??

    Hi, im a GSR engineer but not from a plumbing background. I have a customer with an open vented system that is having to bleed radiators downstairs and upstairs every few weeks. I asked a plumber about this and he said it was either 1. A leak allowing air into system 2. The expansion pipe rises...
  10. W

    H/w expansion vessel

    I need advice but I'm not a plumber, I'm a joiner.We have a house in Portugal and last year had c/h installedwith new 200litre h/w cylinder. The h/w system is non vented and the cylinder is also heated by a solar panel. A month ago the 7 bar pressure relief valve started to leak when the guage...
  11. M

    Legionella risk of expansion pipe to water tank

    Hi, been asked to do a job which seems a little strange. Large office building in London, expansion pipe to roof mounted cold water taken has broken off leaving a hole in the tank, this was noticed when the annual legionella risk carried was out and they have said that the hole needs to be...
    • MOSSEP
    • Thread
    • expansion pipe tank water water tank
    • Replies: 15
    • Forum: Central Heating Forum
  12. A

    Combi Boiler Expansion Vessel Replacement Needed (Halifax area)

    Hi, I am new to the forum and I am hoping members can help. The internal expansion vessel has gone on the combi, I need a 12L external vessel fitting. Job should be simple boiler is located in garage with very easy access and plenty of locations to fix the new expansion vessel. Located in...
    • adamfax
    • Thread
    • boiler combi combi boiler expansion expansion vessel replacement vessel
    • Replies: 5
    • Forum: Boiler Advice Forum
  13. B

    Mini Expansion Vessel

    First post since intro! Worcester 28cdi in property when we bought. Worcester engineer when servicing says should have a mini expansion vessel in cold supply because a water meter is fitted. Boiler has worked with very few problems over the years so why is mini expansion vessel needed now...
  14. cr0ft

    Expansion Vessels

    Quick one folks. I have a spare potable water expansion vessel kicking around our unit. Rather than skip it, I was wondering if I can use it for a sealed CH circuit? I know you can't do it the other way round but my understanding is potable water expansion vessels are built to a better...
  15. O

    expansion pipe on a open vented system

    Can you please tell me the possible problems caused by the vent pipe dipping into the F&E tank below the waterline.
  16. O

    expansion pipe on vented system

    Can you please tell me the possible problems caused by the vent pipe dipping into the F&E tank below the waterline.
  17. N

    Seeking advice on my expansion vessel

    I have a Vitodens 100-W WB1B 26 kw system boiler. Which I believe needs a new expansion vessel, due to when I tried checking the pressure in this vessel, I had water spray out from the valve ..... Am I right that a split may have occurred ? If so, is it a simple job to exchange new for old...
  18. S

    Sometimes water dripping from expansion overflow and sometimes sudden water discharge

    Hi, I have: - - an open vented central heating system with F&E tank in the loft. - Sealed cylinder hot water (megaflow). Guess it won't matter with the issue explained below - Boiler is flexicom hx30 heat only. Most often (but not absolutely everytime), water drips from the expansion tank...
  19. A

    Gunk escaping from cyclinder expansion vessel joint

    I have just moved into a new flat which has an unvented hot water cylinder. There is some very disgusting gunky looking stuff around what appears to be a leaking joint/valve going into the expansion vessel. At first I thought it was from a botched repair attempt using some kind of foam sealant...
  20. S

    No filling loop and red expansion vessel installed. How to represurrize heating?

    Hi, I need bit of an advice about finding the filling loop in my heating system. Apologies for long description but thought to cover as much so relevant solutions can be suggested. I have spent endless hours searching internet including this forum and everywhere it is mentioned there must be...
    • samsg30
    • Thread
    • expansion expansion vessel filling heating vessel
    • Replies: 28
    • Forum: Central Heating Forum

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