DRAINING SYSTEM TO FIT NEW TOWEL RAD

[verdonhog]

I want to create new pipe work in the bathroom for new towel rad linking off my existing rad.
I have a condensing combination boiler fitted in the next bedroom.
Does anyone know if the whole system has to be drained down or could I close off the upstairs rads and just lose the water in the 15mm pipe connecting the rads when the pipe is cut.. I'm going to get all the pipework ready and connect with compression joints at the end.. Any other ideas would be of help.

 

[RobertDIY]

I am certainly not an expert though i have moved a couple or rads. If i were you i would drain your syestem down if you are altering the pipework as a mishap can cause water damage, you cannot sweat wet pipes anyway.

 

[rjm2k]

Just done this myself too, you can get away with only part draining but tbh you might as well just drain the whole lot and stick a bottle of inhibitor in when you re-fill (the blanking caps on the towel rad will be the easiest way to add this). I used pre-soldered "Yorkshire" joints, I think they look better than the compression joints though the push fit copper joints B&Q had in looked almost as small and tidy as the solder joints. A cheap blow torch was 10 quid and bottle of flux was 5 quid and it was really easy.