Thanks for the replys, much appreciated.
I should stress that the system was fitted by a professional and not me.
For Spraggo. If I had a leak would the pressure rise with all the rads on?
I have installed a worcesterbosch 24CDi/28CDi RSF
The system is excellent but I have been advised to have all of my radiators on at the same time and set at a minimum of setting 3 as this maintains the pressure. Now I have turned off radiators in rooms where I require no heat as I believe...