Intermittent Overflow of Central Heating Header Tank Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[GayEddie]

Do you have two tanks in loft if so do you have two overflow pipes or are they joined to one

[GayEddie]

My first thought is the ball valve is still not fixed, can you isolate the tank as in turn off the ball valve.

I think it is still dripping in tank filling it quiet full ( should only be quarter full ) then when you put the boiler on the water starts to heat then it starts pouring out of overflow pipe