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  1. S

    Vailant Extotec Pro 28 - pressure loss

    I've pulled the condenser drain pipe away from the underside of the boiler. There is a constant drip coming from there just now but the boiler is running.
  2. S

    Vailant Extotec Pro 28 - pressure loss

    As it dissapears under the floor to a point I can't see, the I guess my only option would be to put a break in the plastic pipe after it's left the boiler to see if anything is coming out. At least that would be easiest to have rejoined
  3. S

    Vailant Extotec Pro 28 - pressure loss

    It runs along the wall to the right and then drops down under the floor, I assume from there it joins a drain point somewhere
  4. S

    Vailant Extotec Pro 28 - pressure loss

    I believe the condensate pipe on these runs into a trap that just sticks out under the boiler. The water in there was full of "stuff" the first time I looked at it . I've just emptied I and this is what I found
  5. S

    Vailant Extotec Pro 28 - pressure loss

    Expansion vessel has been replaced, and so has the prv
  6. S

    Vailant Extotec Pro 28 - pressure loss

    Sorry not sure what you mean by the condensate pipework. I have a bag over the outlet from the prv and there's nothing coming out of there
  7. S

    Vailant Extotec Pro 28 - pressure loss

    No and there was no sudden movement of water which made me think that the pressure in the pipework remained, meaning no leaks on that side
  8. S

    Vailant Extotec Pro 28 - pressure loss

    Grasping at straws now before having to spend lots of money. Could it be the pressure sensor that is at fault? Returned home today 0.3bar being displayed. The smallest amount of water put into the boiler and its now happily running at 1.5bar
  9. S

    Vailant Extotec Pro 28 - pressure loss

    No, but nothing at all
  10. S

    Vailant Extotec Pro 28 - pressure loss

    Latest update, boiler worked OK during the day. During the night pressure dropped from 1.2 to 0.1bar
  11. S

    Vailant Extotec Pro 28 - pressure loss

    The boiler is around 7 years old and we don't think it is suitable for the size of property. When we've been looking just in case we need to replace it, and most searches are suggesting a 30 or 35kw boiler.
  12. S

    Vailant Extotec Pro 28 - pressure loss

    Bag has been left in place. Nothing coming out of it so far. Will leave it for a day or so and see what happens
  13. S

    Vailant Extotec Pro 28 - pressure loss

    So last night, heating wa turned off for a couple of hours, repressurised to 1.5bar and then isolated the flow and return. Just for good measure, placed a bag over the prv pipework. This morning boiler was sat at 1.2bar and no water in the bag. Does this small reduction indicate a problem within...
  14. S

    Vailant Extotec Pro 28 - pressure loss

    Agreed Harry that's why we went down the route of swapping out the EV, unfortunately the problem remains the same.
  15. S

    Vailant Extotec Pro 28 - pressure loss

    A new EV has been installed and the pre charge was checked before it was installed. Noted about the bag, but the will try that tonight
  16. S

    Vailant Extotec Pro 28 - pressure loss

    The bad join has since been repaired, I added that comment as I wasn't sure if it would be of relevance. With the TRV, we have a small section of copper pipe that come from the trv to the outside of the boiler. As the boiler is in the centre of the house it looks like they have run a plastic...
  17. S

    Vailant Extotec Pro 28 - pressure loss

    Nothing coming out of the prv. This has started since we came home to find a damp ceiling. Traced it back to what appeared to be a bad join on a plastic pipe that the trv blows out into. The boiler is in an old airing cupboard and the pipe from the trv sits inside a plastic pile which...
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