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Hi Gavgas - thanks for the reply, much appreciated... Your synopsis of my crotchety old system seems to be correct, the only thing being that this latest development where the upstairs rads heat up when they shoudn't has never happened before. I'm at a loss as to why this is suddenly...

Hi All, I've recently noticed that my upstairs rads get quite warm even when the heating is turned off but when the hot water is turned on. A bit of research tells me that this is likely to be a sticky check valve in the radiator circuit. The system is quite old but works very well...

Yes it's a rather old conventional system, gravity fed and the pressure where I live has always been pretty good. That was something the friendly customer asked as well. That's put my mind at rest a bit - thanks Nige

Hello good people, I have a leaking water service pipe between the pavement stoptap and the very back of my house, approximately 20m distance and all under concrete/wooden floors that I don't want to disturb. It’s an ordinary Victorian terraced house, I think it’s an iron pipe and it started...