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expansion

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  1. M

    Dripping valve on domestic expansion vessel 4 year old system

    I'm hoping someone can please help as I'm struggling to find a solution I've a 4 year old house and the system was fitted as new. It has a large water tank and an expansion vessel however every morning I'm woken up to the sound of water dripping through this fitting as shown below. This value...
  2. M

    Expansion tank boiling - PLEASE HELP!

    I moved into a 1980's house a few weeks ago. The house has a Ideal Heat 30 boiler in kitchen with cylinder in airing cupboard and tanks in loft. Under boiler there are 3 motorized valves, 2 for heating and 1 for HW. The 2 heating valves are wired together into stat (as there arent seperate zones...
  3. K

    Fill and expansion wrong way around causing air ingress?

    I am receiving conflicting advice on whether the fill and expansion pipes on our new system are the wrong way around and the cause of air noise at the pump weeks after installation as well as the magnaclean keep gaining air. We frequently get air bubbling noise in the pump even after repeated...
  4. B

    Expansion tank - charging and system pressure

    Hi all. This is my first post, and I'm a homeowner and not a heating engineer or plumber, so apologies if my knowledge is a bit off. To give a bit of history we had a problem with water hammer in our pipes so had a pressure reducing valve fitted under the kitchen sink. The local water company...
  5. T

    Expansion Vessel for a Boiler

    Hi Guys, My expansion vessel has burst.. What is an average size I should be looking for in an expansion vessel for my heat only boiler, and are there any good brands I should go for? Thanks!
    • topman870
    • Thread
    • boiler expansion expansion vessel vessel
    • Replies: 6
    • Forum: Boilers
  6. J

    COMBI 2 ZONE + UF + EXPANSION VESSEL ADVICE

    Hello i'm new to the forum, I've done a little searching on here and still have questions. Some history... I had 11 double rads in my house then i extended the house and added underfloor heating and 4 more double rads, the extension was all plumbed in and has been running for a year now. My...
  7. Bogart

    Vent pipe on expansion tank.

    Have inherited a half cocked system which am now trying to sort. Attached is a photo of the setup. well part of it. Am just being certain what the 2 pipes on the top of the air seperator are.Think I am correct in saying the 22mm pipe is the vent and the 15mm pipe is the feed/expansion one. Is it...
  8. V

    Has hot water from expansion pipe damaged cold water storage tank?

    Hi, Trying to get my head around what may have caused our, admittedly very old, plastic cold water storage tank to split and leak through the bathroom ceiling. We have what I believe is referred to as an open vented system - conventional boiler, cold water storage tank and small header tank in...
  9. Bogart

    Expansion tank is it big enough.

    Doing a bit of a revamp of heating system some rads out new ones in . Took old galvanised expansion tank out of loft. Now I reckon this thing had a capacity of a good 100 litres. Looking at replacements they seem to be 18 litre and that is it. Now I have some 22 rads and what with a run to and...
  10. J

    Expansion Relief Valve

    Hi, I am relatively new to installing and repairing unvented cylinders, having worked largely on vented systems up until now. Today I have come across a megaflow that has a TPRV but no Expansion Relief valve on the inlet. Is there ever a situation where the ERV isn't required or does not have...
  11. J

    expansion tank overflowing - a big puzzle why

    Hi all, My customer's f&e tank overflow has had a steady trickle. When the hot water is turned on, it gushes. I initially changed the ball valve (shutting off perfectly) and stiffened the side of the tank (it was flexing out, but otherwise been in for years with no issues), then realised the...
  12. C

    Expansion Vessel losing all pressure in hours?

    Hi All, Bit clueless here, but wanted some advice if possible. We had a new 200ltr unvented system installed recently. All seemed fine, however the CH kept turning off and rads going cold. I checked the EV in the loft, and it's pressure gauge had dropped to 0. I opened the valves up and...
  13. Eyespy999

    Expansion vessel pump

    Afternoon, I am looking to add to my tools, can anyone reccomed a pump for expansion vessels please? Regards
  14. S

    Expansion Vessel Requires Replacement In Lancs

    Hi, I have solar panels for the hot water system & an expansion tank has developed a leak. I'm based in the Clitheroe area of Lands and would like a quote from someone who covers this area. Thanks.
  15. H

    expansion vessel pumo

    after some advice need a new pump for re pressurising expansion vessel which one would you recommend also do you use a pressure gauge or pump to test vessel
  16. R

    6 bar expansion relief outlet keeps dripping into outlet

    Hi All I replaced this a year ago and now its dripping again. Image of part here: Photo 15-08-2014 11 26 00.jpg This video will explain the issue better (click on video to hear me). https://goo.gl/photos/zUrBQs2LjagBW1yt9 Thank you for any advice. R
  17. H

    Expansion Vessel and water hammer

    Good morning, I've just been asked that if someone has a tap which shuts of the water abruptly, such as the cartridge valve taps and water hammer occurs, would fitting a small expansion vessel close to the tap relieve this? To be honest I have no idea but I can find the logic to this question...
  18. F

    Expansion Vessel size ?

    I have an underfloor heating system of 720M of 16mm Alpe pipe & only short 2M runs of 28mm pipe to a Ground source heat pump. Absolute maximum temp rise of 65 degrees more probable 40 degrees. What size should the expansion vessel be ?
  19. S

    Unvented Expansion Vessel Keeps Failing

    I have a RM Stelflow 210 indirect unvented cylinder. Over the years it's been in, the expansion vessel has failed on 3 occasions. Any ideas what could be causing this? cheers, Stephen
    • stephenr
    • Thread
    • expansion expansion vessel unvented vessel
    • Replies: 3
    • Forum: Central Heating Forum
  20. finchy01

    Loads noise from expansion vessel

    I recently replaced a PRV on a cylinder that was letting by. I drained from the T&P valve and a little extra from the doc on the cold feed right before cylinder. I also repressurised the external exp vessel to just shy of 3bar as it was totally flat. I got a call yesterday saying that every ime...
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