Worcester greenstar 25si

[Shaun999]

Hi

I am totally new here so hope some one may be able to help, the above worcester condensing boiler is located in the kitchen, I need to remove and replace the radiator valves in the bathroom, altering the position slightly for a new rad/towel rail.

As the bathroom radiator is above the boiler, do I need to drain the whole system or just drain enough to work on the pipes in the bathroom? There is only one other radiator upstairs, so I was hoping I could get away with a partial drain?

Thanks in advance for any help

 

[fatplumber]

Just drain down to the level you need to work at. take this opportunity to put some inhibitor in as well.

 

[Shaun999]

Many thanks, was hoping I could get away with that, the system already has inhibitor in it. If I do a partial drain, I will obviously lose some, but how do I know how much to put in, and should it be the same make?
Cheers
Shaun

 

[gas4you]

Just add a litre of X100 or the Fernox equivalent. You can't overdose it.

If you know the existing make then use that, if you don't then don't worry about it.