Draining radiators - Combi boiler

I am about to drain my Dads central heating radiators (to move pipes to build a cupboard). I've drained rads before with conventional systems with header tank, and refilled with inhibitor. Can anyone advise me what to do with a combi boiler. My Dad says theres no header tank, so does the system use inhibitor? Where do you put it in? And do you have to isolate/drain the boiler to drain the Rads? Any help would be much appreciated Nis

Reply to
Nis
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Turn off the boiler. Drain the system. Do your work.Put in inhibitor via a radiator ( a bit tricky ) then refill the system via the filling loop which should be near the boiler Take the pressure up to approx 1.5bar ( gauge on boiler ) Check for leaks. Good Luck

Reply to
IAN

Back ground help in the Sealed CH FAQ

Reply to
Ed Sirett

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