expansion

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expansion

Recent contents Top users
  1. M

    Inline potable expansion valves

    Has anyone fit inline expansion valve on the cold water supply to an unvented cylinder. The normal style were you just tee of after the composite valve can leave a dead leg in the pipework? A local water authority has pulled some. Thanks
  2. M

    Expansion vessel size unvented hot water

    I think I looked into it a few years ago. That a modern 200litre unvented cylinder would need a higher litre expansion vessel then one that was saying 10-15 years old. As they are made of thinner steele now?
    • Matt0029
    • Thread
    • expansion expansion vessel hot water size unvented vessel water
    • Replies: 2
    • Forum: UK Plumbers Forums
  3. C

    Leak from corroded header/expansion tank

    Expansion Tank leaking into ceiling - not the joints Scared might have deluge so have turned off supply and drained tank - can I leave for a few days pending replacement?
  4. D

    Expansion vessel issue possibly?

    Hi I have a baxi duotec combi boiler that every day or other day needs topping up as pressure drops below 0.5bar. When fired up it can reach OVER 2.5bar also whilst running CH. Is this more than likely a flat Expansion Vessel that needs inflating or could there be other possible causes if...
  5. M

    Worcester 28i expansion vessel hose??

    Hi guys. Can this hose be removed without taking the vessel out? Is there a specific tool that makes it doable?? Cheers
  6. R

    Need to replace expansion vessel (oil fired boiler)

    Looking for someone that can replace the expansion vessel on an old heating system that is losing pressure every day and needs topping up at least three times a day. Trying to eliminate what the cause could be. Appreciate that it could be a leak somewhere, but looking to tackle one issue at a...
    • Robot22
    • Thread
    • boiler expansion expansion vessel replace vessel
    • Replies: 2
    • Forum: Boilers
  7. M

    Unvented cylinder expansion vessel siting?

    Just a quick one folks if you don’t mind. Are there any regs around the siting of a vessel? Can they be hung horizontal or upside down if need be? Cheers
    • macka09
    • Thread
    • cylinder expansion expansion vessel unvented unvented cylinder vessel
    • Replies: 2
    • Forum: Plumbers Arms
  8. RenzoPan

    Leak in the expansion vessel - can I keep the heating on?

    Hi, We have a leak in the expansion vessel, which is on the first floor, above the hot water cylinder. As we wait for a plumber, can we keep the heating on?
  9. RenzoPan

    What is the pressure in this cylinder expansion vessel?

    I was told by the plumber to keep an eye on the pressure, to ensure it stays above 1.0. The red one is… but the black one is not…. What do the two mean?
  10. Crossfingers

    Expansion Vessel Hose Change

    Hi How simple is it to replace the expansion vessel hose? Do I simply turn the boiler off, drain the boiler and swap hoses, using some PTFE tape?
  11. E

    How to calculate heating system capacity for expansion tank

    Hello want to know on how do you calculate size of expansion tank for closed heating systems . for example 500 meters of 16mm underfloor heating and 4 double ~1000mm radiators , hot water cylinder coil , and oil boiler
  12. K

    Fungus/growth floating on top of feed & expansion tank?

    I’ve recently cleaned my central heating system with Sentinel X400 cleaner, flushed it out clear, refilled & added Sentinel X100 inhibitor. After a couple of months, I went to the loft to check the feed & expansion tank, open the lid, there’s some kind of white/yellowish fungus/growth floating...
  13. T

    Expansion Vessel Questions

    Just some questions re Expansion Vessels: Q1 when system boiler water is cold, how full should the Expansion vessel be Q2 18L Expansion vessel - does this mean the whole volume of the vessel is 18L
  14. T

    Unvented Expansion Vessel Replacement - what else needs changing

    Potable water unvented expansion vessel needs replacing - water is coming down the tundish. What else needs to be replaced. Does the enginneer need a G3 unvented certificate to do this work and what are the consequences if he does not have one
  15. L

    What threads for flexi pope to expansion vessel?

    Hi all, I need to order a flexible pipe to connect this vessel up with. The pressure vessel instructions don't mention the thread size? A 22mm pipe almost fits over the threads so I assume it's 3/4 BSP? Does that sound right? The other end goes to the valve, will a flexi like this...
  16. T

    Why is water flowing through my expansion pipe

    Water is flowing through my central heating expansion pipe even when cold with the pump running. Hot water flows through it when the system is heated. Pump has been replaced but still happens
  17. Andrew Garrett

    Worcester Bosch i30 Greenstar PRV and Expansion Chamber replacement

    Hi all What kind of time is required to replace the Pressure Relief Valve and the expansion chamber in a 6 year old Worcester Bosch i30 Greenstar? Is this a 3 hour job? Also what kind of price would be reasonable? I am using a new gas engineer and I want to verify that his bill is fair. I am...
  18. M

    Taking hot water feed from expansion pipe.

    I fitting a new Mira shower in a slightly different position in the bathroom. It’s going to be easier to feed it with cold water from main cold cylinder feed and from a connection to the hot water cylinder expansion pipe. These are just above the shower position. the pipes are both 22mm and I...
  19. S

    Changing expansion vessel?

    After the plumber changed the expansion vessel, the boiler was leaking even worse leading it to being condemned. It is quite old, so I suspect it was on its last legs anyway. Still, he was banging it quite a lot, and I just wanted to check there was a good reason for him to do so. Thanks.
    • Salchi
    • Thread
    • expansion expansion vessel vessel
    • Replies: 2
    • Forum: Plumbing Tools
  20. C

    Do I need expansion vessels?

    Hi Looking at getting a Worcester Bosch 4000 24kw system boiler and a 210L Ideal tank. A friend showed us their system and they had two expansion vessels, one for the hot water tank and one for the central heating. Thought I'd have a look into the technical side before speaking with plumber...
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