Draining radiators

[markyyyyyy]

If I just want to drain 1 downstairs radiator (to replace with new radiator and adjust pipework) and all of the pipework only, upstairs, do I just turn off both valves on all radiators upstairs and downstairs, therefore trapping the water inside the radiator and only draining the pipe work?

Or do I have to drain all upstairs including all radiators if I want to completely remove one radiator downstairs?

Cheers

 

[opps]

I am not a plumber...

Is your system on a combi boiler or a gravity fed system?

 

[foxhole]

Assuming the valves are sound then yes you can isolate to reduce drain down time . With an old system I would do a complete drain to remove some sludge and then replace additives when finished .

 

[markyyyyyy]

Assuming the valves are sound then yes you can isolate to reduce drain down time . With an old system I would do a complete drain to remove some sludge and then replace additives when finished .

Cheers

Where abouts do I put additives in to the system?

 

[SithLordHood]

you could put them in the new radiator when fitting it, pour in before fitting the bleed valve.
This kit will help

 

[SimonH2]

You can get additives in "gun" or "aerosol" forms.
In both cases, you remove the bleed screw or plug, attach the adapter, then inject the additive it - either using a gun as though squeezing put sealant, or using internal pressure in in an "aerosol" style can.

 

[markyyyyyy]

Brilliant thanks, I’ll do that