so in my house the kitchen is under the bathroom and on the kitchen ceiling there is a light fitting which previously had water in it from a leak, so i took a look under the bath (where most of the pipework is) and couldnt see any leak. But under the bathroom floor in the void is where all the central heating pipes for the upper level split and go there own way so i figured that as i was also suffering from a pressure drop in the sealed combi bolier it must be the heating
put in a can of fernox f4 and the leak stops!!
3 months later the leak is back but only in a very minor way (almost no pressure loss from heating now) the only thing that has changed is that in that time i have changed over 3 radiators this means isolating and draining away the water from that rad / branch
so my question is has me draining down 3 rads removed enough of the fernox to make the leak come back or wouldnt that affect it?
