The down pipes are about that size. The whole system is connected by that rubbish fastfit rubber stuff :cry:
My last thought would be to shut down all radiators at each end and turn the heating on, try and force the issue, however I might damaage the rubbish piping under floor, any...
Hello,
I have a 7 year old Combi bolier system in my flat and one small radiator has stopped working.
I bled all the radiators first, no joy.
I have checked the TRV and unscrewed it, the pin is moving up and down okay.
I have also switched the lockshield on and off a few times...