RedSnapper wrote:If you are certain, or can establish, that your mother's overflow was in place before the flue then I would have thought that would be your best defense. After all, an overflow is likely to at least drip at times, that is it's essential function. If that dripping can damage a boiler through water entering the flue then it is surely bad practice at best to site the flue directly beneath the overflow.
Yes, the overflow [now identified as Radiators pressure-relief valve] is original. Its twin is sited approx. 12 feet directly below - the pressure-relief valve for the Ground Floor system. Boilers for both apartments have been replaced in the years since the property was converted, and the rectangular 'making good' areas from previous positioning of the Flues on both Ground and First Floors can be seen in the 'patched' appearance of the surface of the render to the outside wall. So, in brief, the pressure-relief valves are both in their original positions, and both Boilers have been replaced - with replacement Flues in new positions. And Ground Floor Flue is a poor looking device even to my untrained eye. There is a distinctly 'unfinished' look to the thing, which suggests the unit was intended to be fitted with an outside cover. It looks like it can take in water from every direction - really looks like there may be some part of it missing [to be precise, a cover for the thing]. Maybe the situation is not too bleak after all. I will contact Boiler Install companies tomorrow, to get their comments on the style of Ground Floor Flue.
Very many thanks, all - including Scott and Didds
![Smile :)](./images/smilies/icon_e_smile.gif)
I really appreciate you all taking the trouble to consider the problem, as I want very much if I can to try to find a solution that does not involve telling my Mum that her downstairs neighbours are minded to take her to Court
![Surprised :o](./images/smilies/icon_e_surprised.gif)
I will post update once I have more info.