Combi boiler question

[Snakey_Jakey]

Hi,
i am redoing my bathroom and am in the process of moving the radiator, sink and bath. due to this both the radiator circuit is open and the hot and cold taps too.

i would like to turn the water back on as i have been let down by my plasterer and i may not be able to fit everything soon. if i plug/seal the hot and cold water pipes and leave the radiator pipes open, can i turn on the water? on a combi boiler is the radiator side completely isolated from the hot water taps?

 

[oilman]

If the radiator valves are shut, yes.

The radiators and the hot water are isolated, or should be.

 

[breezer]

will it not need refilling / represureising too?

 

[Snakey_Jakey]

so, the radiator part of the combi is a sealed system, the same water is pumped around and heated. is the only way for water to enter the system through the flexi pipe beneath the boiler. is it thru this pipe that you repressurise the system? is this how the mains water refills the radiators?

Also when you are doing this you have to bleed the radiators to let the air out right? when i do this which radiators do u do first? ground floor then first floor?


Thanks so much for your help so far

 

[breezer]

i am not a plumber or heating engineer but we too have a combi (when it works, but thats another story) the answers to your questions are all yes.

and it doesnt matter, but you should bleed while system is off then re pressurise (that is to account for any water you "lost" while represureising in the first place)