help, combi boiler, need to drain rads


Postby gjc » Tue Aug 28, 2007 1:37 pm

Combi boiler sealed system. Need to drain 2 radiators. Can I just turn off rad valves and drain as you would with a conventional system?.
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Postby htg engineer » Wed Aug 29, 2007 3:56 pm

yes you can remove the radiators, like you would with any other, the only difference is you may need to top up the boiler pressure. You will definately have to when replacing the radiators.

This will be either a built in combi fill, or a external filling loop, situated on or near the boiler.
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