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  1. M

    non draining c/h header tank

    thank you to the three of you. obvioulsy, I was major league hoping that Tonys possible cause was not the fault! :? and i cant say that I really understood the clear instructions from theheatinghelper and holty (a "15mm compression straight"?? is deff double dutch to this stupid amateur ...
  2. M

    non draining c/h header tank

    hello. Could someone advise plse? I'm trying to drain and flush my c/h system. It's an open one, not sealed. I've drained the radiators and checked that each one is empty by openeing the valve at the bottom of each one (where there is one.not all the ones upstairs have one) I stopped the...
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