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PostPosted: Fri Oct 06, 2017 7:35 pm 
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Hoping someone can help me. The house has air source heating with antifreeze in the system. I need to replace a standard radiator in the en suite with a towel radiator, normally I would isolate the valves, unscrew and tip the radiator upside down and drain it but there are no isolating valves. Can the pipes be frozen? If not what's the best way to go about it? And how do I top the system up correctly after I have replaced the rad?

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PostPosted: Mon Oct 09, 2017 5:05 am 
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Irrespective of how the water is heated makes no difference, if the heating is off then yes the pipes can be frozen depending on the spec of the current antifreeze, however, if your system hasn’t been filled with antifreeze/inhibitor for a while why not drain it, do the work then refill, personally I’d fill with water first, give it a few days in case of leaks, drain then refill with antifreeze & inhibitor

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