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As already mentioned the water might be coming from the tundish if the over-pressure safety valve is operating.
Hang some thin cloth loosely around the tundish and see if it gets wet. ( do not tie it tight othewise the safe operation of the tundish may be compromised. If you draw some lines on the cloth using water soluable ink then even if it dries out before you look at the ink will have run when it was wet.
Hang some thin cloth loosely around the tundish and see if it gets wet. ( do not tie it tight othewise the safe operation of the tundish may be compromised. If you draw some lines on the cloth using water soluable ink then even if it dries out before you look at the ink will have run when it was wet.
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In theory the safety valve that discharges into the tundish should not open if the system is working normally. If it is opening fequently then either the vlave is opening at normal working pressure and needs replacing or the pressure in the cylinder is going too high. That will require a G3 registered plumber to check the system out to fond why it is going over pressure.
G3 relates to the servicing of pressurised hot water cylinders
G3 relates to the servicing of pressurised hot water cylinders
Turns out the leak is coming from the black valve (connected to discharge pipe ) on the left when pressure is too much, any ideas on cost of supply and replace ? Is it just called a pressure relief valve ? there is another one on the other side fixed at 3.5 bar. Should I replace both ?
That's one of the safety system of your un-vented, you need a qualified un-vented engineer in to check and replace as necessary. It's not a DIY fix I'm afraid.
any ideas what I will be looking at cost wise ?
The fault is likely to be something else. Usually can be repaired with no replacement parts cost.
I would charge my standard diagnostic visit fee of £84.
But there is no standardisation of charges for plumbing and heating work so try to ask before you call anyone.
Tony
I would charge my standard diagnostic visit fee of £84.
But there is no standardisation of charges for plumbing and heating work so try to ask before you call anyone.
Tony
you mean causing the black vale to leak ? any ideas what it could be ? I had someone round and he said it was the black valve leaking not balancing the pressure successfully, said he would come back once he has the cost of the part etc and let me know. He said it may even be worth replacing both sides as the other side could be causing it somehow also.
didn't charge to be honest, as he lives in the other street i just asked him to take a look.
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