Recent content by euan

We've all stuck our fingers into the tundish (not entirely sure this was a safe thing to do if boiling water coming out but anyway...) and there is nothing discharging. Dont'd know about this airgap thing - what should I be doing periodically? I'm beginning to wonder if something else...

I live in a block of flats built new about 7 years ago. Unvented system, gas boiler (Potterton I think). There are 3 flats, one above each other, and copper discharge pipes come out at each level, join a common downpipe, and terminate just above the ground at the bottom. From looking at the...