Recent content by b1lb0b4gg1ns

The ballcock valve in the main header tank is dripping even with every tap, washing machine etc switched off or isolated. In the return copper pipe from the expansion tank I found a tiny pin hole which was leaking (fixed now), so I can believe that the coil in the hot water cylinder may have...

Thanks Chris R in Antarctica. I may try that, but I've just thought that if everything is switched off, then if water is 'leaking' into the coil, then the ballcock valve in the main Header tank should be dripping. So I'll try that first. Thanks for all the help guys - I was going nuts! Nigel

Thanks Brian, I have found that hot water is flowing out of the vent pipe into the expansion tank, as soon as the pump starts, and then flows back into the system through the return from the expansion tank. I think the pump was originally positioned incorrectly, after the boiler and before...

There is a small expansion tank for the CH and HW system in the loft. It fills to overflow ever so slightly. I have emptied the tank and replaced the ballcock and valve, which doesn't seem to leak/drip, but within a day the overflow pipe is dripping again and the expansion tank has filled...