Recent content by Stonebarn

Hi, The only thing I am aware off is the external overflow, I had presumed that it vented into the tank and filled it to a point where it then overflowed outside.

There is no wall stat for second zone. I can hear water rumbling in the house (very loud) followed by water flowing out of the overflow. I then hear, what sounds like a value closing accompanied by a screeching noise. The water then stops overflowing and for the next few days...

Hello, I have a slight problem. I have a two zone system, with the lower zone controlled via a wall thermostat and the upper zone via TRV's. When the lower zone is not calling for heat and the HW is satisfied, the system boils over into the header tank. I have turned the upper zone off from...