Recent content by vedavis

Hi Thanks for the response. The problem started about eighteen months ago. Before that it was OK, so presumably pipe configuration can be ruled out as this has not been changed. I have tried running pump at both low and high speed. This makes no difference.How would I deal with oxide in cold...

I have an oil-fired vented central heating system. Whenever the heating is on there is a constant overflow of hot water from the inverted J pipe over the expansion tank. A new pump and motorised valve have been fitted. The whole system has twice been treated to remove sludge, drained, flushed...