That'll be why then :-)
When I looked in the loft I have three tanks. One without 'ballcock' and two with. The big one (where the water comes in and has a 'ballcock') has a pipe that feeds into top of it (its u shapes so its not an overflow for the tank .... more that you would except water...
Re condensate pipe, I looked into this online and it appears to be a pipe from the back of the boiler to the outside. I checked and I can see such a pipe coming out of the back of the boiler and outside.
Mark
Hi
I know this sounds odd but when the boiler (central heating) goes off, about 10 minutes after I hear what sounds like a flushing sound come from the back of the house (somewhere near where the boiler is).
I sounds like a bucket of water is being poured out a window ... a strange sound...