Work on DHW Without Draining Down Combi Boiler?
Posted: Wed Dec 03, 2014 4:06 pm
After some work on my combi CH system I've just refilled it and put inhibitor in. I've just discovered that I've got a dead leg on my DHW system which I'd like to take out. Is it ok to switch off the boiler, shut the main stopcock into the house, open all the taps in the house to drain the domestic side and then work to remove the dead leg from the DHW system or do I have to drain the whole CH system (with inhibitor!) as well. I don't imagine that I'll have to drain the boiler as well but I'm not sure so I thought I had better check on here. Thanks.