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vessel

  1. J

    Expansion vessel saga continues...

    Evening all, i’m looking for advice... Technical: I have PP150B Santon direct unvented hot water cylinder, cold water regulator at 3.5 bar and expansion vessel at 3.5bar. All the pipes are “clipped”. Information from plumber. I’ve only just moved in to my first house, which is approx. 13 years...
  2. D

    Banging expansion vessel when turning on taps

    Hi, had a new pressurised system put in about a year ago...long long story bu the guy whom put it in does not have the greatest aftercare available...lets leave it at that! Anyway, all is working fine with the exception of when the taps have not been used for a short while, if you turn them on...
  3. L

    Boiler prv and expansion vessel

    Hi. I’m looking for some advice. I recently bled my radiators then over pressurised the boiler (one of the filling valves got left open) this led to the prv opening and draining water. I got a plumber out and he said the valve didn’t reseat properly due to debris in the pipe so he flushed some...
  4. B

    fog horn sound after changing expansion vessel

    This a cry for help ! ! and apologies for the lack of knowledge displayed as I'm just a house owner. Nobody seems to have the knowledge to identify what the fog horn sound is and I'm at my wits end! Even Tempest haven't got a clue! So i have a Combi boiler and a Tempest cylinder in the loft...
  5. B

    Ideal Isar HE expansion vessel

    Hi, Just a quick question. Does anyone know if the expansion vessel Schrader valve is accessible on an Ideal Isar HE30 combi boiler? I couldn't see the valve on one today to check it, and if the valve is accessible can you get to the valve enough to replace the Schrader valve if it starts to...
  6. C

    Expansion Vessel Size

    I had a boiler fitted over 3 yrs ago. It is a commercial boiler - 100kw. The installer fitted an expansion vessel which is about 20 litres. We have about 33 double rad and 2 single rads on the system. Someone mentioned to me that the expansion vessel is way too samll as we constantly have to...
  7. M

    Baxi DuoTec 28 HE Expansion Vessel Issue.

    Hi All I have an issue with the boiler building pressure quickly to over 3 Bar and the safety valve kicking in. The expansion vessel has been re pressurised and holds air. would/could it be that the micro bore wet pipe is blocked?
  8. R

    How do I know if expansion vessel faulty

    Evening everyone so I’m just wanting to as a quick question please, how quickly would the pressure rise to over 3 if my expansion vessel is faulty been using the boiler but only a hour at night and at morning just now as it’s heating up the house with being mild ish outside normally over the...
  9. hary_j

    Expansion vessel leaking or blocked heat exchanger

    Evening gentlemen, Stopped at my last job today, it was a vaillant eco tec plus 837 combi. Boiler is building excessive pressure, whether it be on DHW or CH mode. Upon firing up on CH mode, pressure rises to maximum and prv lets by at 3.5bar all within around 5-10mins of being operational. I...
  10. Rob Foster

    Expansion Vessel - Not sure abouts its purpose

    Can somebody please explain the function of the expansion vessel on my heating. Is it to absorb the increased volume of water when its hot or/and to be a reservoir of water to top up the heating system when there are small drips Many thanks
  11. Scott_D

    Expansion vessel - not ugly

    Looking for a small additional expansion vessel for a heating system to go next to a combi as there are a few big column rads in the house. Ideally not something ugly :confused: so the standard red type is out. I have seen some online pictures of a compact almost like a squashed football but no...
  12. N

    Expansion vessel connector / pressure valve replacement

    Hi all. I need to replace a expansion vessel as it's leaking and and the same time I would like to relocate it within the same cupboard. I have done a fair bit of plumbing work over the years (good standard DIY'er) so the job itself looks manageable but I have a couple of questions. BTW, I plan...
  13. Scott_D

    Expansion vessel hose popped off

    The hose to the expansion vessel popped off on this logic+ combi I was fitting today. Been under pressure for a week. Fired up for an hour today then put into max to commission and it flooded the boiler. Ideal are coming out Thursday.
  14. Riley

    Expansion Vessel Siting

    Not strictly a gas issue here but need some advice in conjunction with an old Worcester 24i combi. Exp vessel has failed and will not hold a charge. Intend to fit an external vessel however the only accessible pipework is a pipe with an AAV on it in what was the old airing cupboard. Now I know...
  15. D

    Cordless expansion vessel pump

    Hi, I've been looking at cordless inflator for recharging ex. vessels. Does anyone use one and can recommend or advise to stay away from any particular ones? I'm keen to get something better than the foot pump I use at the min, but don't wanna chuck £100 at something that's useless. Thanks
  16. JLS

    Expansion vessel sizing question (because it's driving me mad)

    Hi all, I wonder if someone can explain something to me when it comes to expansion vessel sizing. On the basis of about 4% expansion at 100degrees one would think that for a 200l closed system an 8l expansion vessel would be sufficient, with a bit of a safety factor say 10l. Worcester...
  17. T

    Do I need an additional expansion vessel

    Before I call a plumber ......... My boiler (Gloworm 18sxi) slowly loses pressure and I'm having to regularly top it up. There are no obvious leaks anywhere and no discharge from the PRV as far as I can tell. Just reading through the manual for the boiler, it says that it has an internal 8...
  18. P

    Unvented expansion vessel pressure

    Plumbed the property back in 2004 and was back again to move both vessels to make space for a coat rack. No issues in 14 years apart from the big frost in 09/10 splitting a copper run to the ensuite shower and nearly flooding the property. Does anyone know the pressure...
  19. MrYates

    Glow worm Ultracom 30sxi expansion vessel replacement.

    After reading about problems and relating them to my situation it seemed that the expansion vessel could be faulty. I depressed the schrader valve inner. After a brief and insignificant exhalation, I gave it a pump. There was a gurgling bubbling noise from the EV. On re-testing for pressure...
  20. S

    Told boiler needs a new expansion vessel along with pressure relief valve - how much should this be?

    Hi We have a vaillant turbo max 824e rs combi boiler that has been serviced and we've been told that the boiler is found to be gas safe but is in need of a new expansion vessel along with a pressure relief valve. How much should be expected to pay for this (Coventry)? I have only one quote...

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