Draining Closed Loop Heating System - Any tips?

angelavdavis

Hi,

I have four radiators that have all rusted at the ends and need replacement, plus some TRVs to fit on 13 other radiators, so will be looking to drain down my closed loop system for a few days before flushing out the old rads and refilling.

I have had some system cleanser in the system, although the heating has been off for a few weeks now, so am guessing I will need to restart the heating to circulate in order that I am drain the worst of any build up before adding the new rads?

I believe I also need to disconnect the heating pump so not to cause it any issues - is this correct?

I have replaced/added additional radiators onto my system before but left the actual reconnection to the system to a plumber, however last time I did this, I ended up with a leaking joint on the second floor (one he had been left to do) and a ruined newly decorated bedroom on the first floor, so have decided to do it myself this time.

Does anyone else have any other tips before I start? Thanks in advance.