Recent content by pedr0

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    Leak in indirect HW circuit - do I need to drain and solder?

    OK. Update: The leak is coming from the tundish. It was hard to spot, because the water on the ceiling actually occurs when the flow through the tundish has slowed to a very slow trickle. So slow, that it no longer streams like the picture in post 25: It's when it slows down so much that the...
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    Leak in indirect HW circuit - do I need to drain and solder?

    Having investigated though a downlight cutout, I can tell that the water marks on the ceiling are along a line where 2 plasterboards meet. Above is a tiled bathroom . So the water might be coming from anywhere in a roughly 4 to 5 foot square area and then trickling to the edge of the...
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    Leak in indirect HW circuit - do I need to drain and solder?

    But could I speed that process up by pouring fresh water into the tundish?
  4. P

    Leak in indirect HW circuit - do I need to drain and solder?

    Yes - followed the pipe from the tundish. Can't find any leak yet. I'm leaving it to run a lot longer to see if perhaps a build up is required before the leak starts
  5. P

    Leak in indirect HW circuit - do I need to drain and solder?

    Still haven't found the leak. However, shortly after turning the hw on, a small trickle flows into a recepticle which passes it into a copper pipe which is connected to the soil stack. Is this to relieve pressure as the water in the cylinder expands? Is it normal /expected? Here's a wider...
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    Leak in indirect HW circuit - do I need to drain and solder?

    HW cylinder is mains pressure type. I.e. I don't have a cold water tank but I do have a pressure vessel. After terryplumb helped me understand that UFH CH and HW are all fed by same flow and return, I'm starting to think that the leak travels in the ceiling void before coming through the...
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    Leak in indirect HW circuit - do I need to drain and solder?

    OK. I understand your earlier query about the rads now. Quite weird that ufh doesn't cause the leak. Will check rads tomorrow.
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    Leak in indirect HW circuit - do I need to drain and solder?

    ... At least I will only have to drain the top floor though
  9. P

    Leak in indirect HW circuit - do I need to drain and solder?

    Not quite, but your reply answers my question. I was hoping the cylinder coil was seperate from the radiators and ufh, only because it felt like that might have made the scope of the job smaller - less to drain etc
  10. P

    Leak in indirect HW circuit - do I need to drain and solder?

    Boiler and cylinder are in a loft conversion (where there are two bedrooms with rads and a shower room). Is the hw circuit independent of rads? Edit : sorry, didn't actually answer your question. The leak drips through the ceiling of the room below the loft conversion. The boiler is at one side...
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    Leak in indirect HW circuit - do I need to drain and solder?

    Don't think so. Certainly not the underfloor heating. Will try with the rads tomorrow am. But as it stands I have a high confidence that it's the indirect hw circuit specifically.
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    Leak in indirect HW circuit - do I need to drain and solder?

    It's definitely the indirect HW cylinder circuit. As soon as the pump kicks in to heat the cylinder, the leak starts. As soon as I turn the hot water off at nest thermostat, the leak stops.
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    Leak in indirect HW circuit - do I need to drain and solder?

    I might start cutting the ceiling this weekend and will report my findings, but in the meantime I would still welcome any thoughts on the questions above.
  14. P

    Leak in indirect HW circuit - do I need to drain and solder?

    Hi all, the circuit that heats my HW tank has developed a leak. What are my options for fixing it? * The leak is in the copper pipe run between the boiler and the tank - i.e. not at the connection to the boiler nor at the cylinder. * It only drips through the ceiling when the boiler fires up to...
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