Draining system but drain cock above boiler on ground floor?

[jackmal]

Hello,

I am replacing a 1st floor bathroom radiator with a towel rail. This requires some modification to the pipework, which is 10mm microbore.

I have read the forum on draining the system, but none of my ground floor radiators, or the connecting 10mm microbore pipework or rad valves, have a drain plug fitted.

The only one I can see is on a 22mm pipe which goes into the top of the wall mounted boiler, which is obviously not the lowest point in the system.

I believe the system is free vented. I also think the ground floor radiators may be served from the first floor as ground floor is solid.

Is what I have described possible? And if so how can I drain the system, or modify the pipework without draining it?

Any help or suggestions would be very appreciated

 

[chrishutt]

You don't need to drain the system below the level that you intend to work on. If there are no convenient drain points, you can drain at one of the radiator connections - maybe the one your replacing would be a good idea. Just shut the iso valves on rad, undo union nuts, catch water with shallow bowls/trays, etc. , remove rad and then drain pipework via detached rad valves.