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Hi, I am trying to find the volume of water in my central heating system with a view to making sure the proper amount of inhibitor is in it. The system is as follows ... 2300 ft2 four bedroom house with underfloor heating (1228m of 10mm i.d. pipe) 1 x small single radiator 1 x small...

Hi. Hope someone can help please. I have a Sime boiler running two radiators, two towel rails and my underfloor heating system (Polytherm). I have been having problems. The boiler has a pressure gauge but there is also a pressure gauge at the filling point of the system which is actually on...