Don't ring any bells Ian,,, Unigas?
The earlier Baxi’s had a sleeve through which the glue was pushed. It was to stop staining of wall decoration above the flue. But, certainly not on my jobs, they did not protrude through the outside skin of the wall. But if it did it, even flush, was flush, you could have been making sure regardless the flue was central.?
Where was the gap, exactly?
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