DIY Doctor UK DIY Forums

Hi There,

I have an open CH system, with a GAS boiler in the shed. When the heat is on I don't have a leak. When the heat is off, I have constant running water in the attic where the top-up tank is situated. Tried some leak seal, worked for some while, but leak starting again. A little bizarre ! No sign of leak in house. Any thoughts on the problem or how to isolate the leak. I don't think it's a leak from the CH System into the Hot Water Cylinder, as it runs continuously and there is no sign of water from overflow pipes....

Comments welcome....

Aongus

It sounds like your c/h pump is over running and isolation valves closed causing pumped water going into your header tank

Thanks for the reply, I've followed up with a plumber and looked at the tank, it's not over pumping, but I have a leak approx. 2-3 litres a minute, no sign of the leak in the house, getting someone in with listening / thermal eqm.