Turning off the mains to a combi boiler

I

imamartian

hi,
forgive me if this question is similar to others, but the ones i've read didn't completely answer my question.

I want to refit my bathroom, and i will be turning off the water at the mains stop cock. However, i have a combi boiler....

Question 1 - do i just run the hot tap to drain the system down?
Question 2 - is it safe to completely drain a combi boiler?
Question 3 - is it sufficient just to turn the mains on again to refill the boiler?


Thanks
 
Sponsored Links
yes but some water will remain.

yes.

yes.
 
You need to understand that there are two separate lots of water in a combi.

Firstly there is a small amount of mains water which gets heated and then supplies the hot taps. This you can turn off and drain (simply open the hot taps) from boiler without any problems.

Secondly there is a much larger amount of heating system water which you probably don't need to drain or interfere with in any way (unless you're altering the heating system - e.g. new bathroom rad). Draining and refilling that side of the system is more complicated and should not be done unless you understand what's required.
 
Thanks people.

Do i need to turn the boiler off beforehand?
 
Sponsored Links
You have not told us the make of boiler!

NEVER turn off the mains electricity to a combi boiler if it has a pilot light!

You can remove the cold water supply and still use the boiler for heating.

Tony
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Back
Top