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- 18 Jun 2008
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Hi all
Got a sealed system, boiler been losing about 0.4bar over a week. I have found a pinhole leak half way up the towel rad (where one of the horizontal bars meets the vertical frame) so am hoping that's the cause of the pressure loss. I have closed both valves to isolate the offending rad.
*daft question alert*
So how come the flow pipe to the radiator is now cold when the CH turned on? I mean, rad is cold and return pipe is cold - as you would expect - but how does the hot water "know" not to flow towards the isolated rad?
Got a sealed system, boiler been losing about 0.4bar over a week. I have found a pinhole leak half way up the towel rad (where one of the horizontal bars meets the vertical frame) so am hoping that's the cause of the pressure loss. I have closed both valves to isolate the offending rad.
*daft question alert*
So how come the flow pipe to the radiator is now cold when the CH turned on? I mean, rad is cold and return pipe is cold - as you would expect - but how does the hot water "know" not to flow towards the isolated rad?