Problems after de sludging radiator. Pressure issues & cold radiator

[Bryanjsmith]

Hi After some advice;
had a large cold spot in the bottom of the radiator, so thought I’d drain it and flush it out .

Isolated radiator and drained it. Removed from the wall took into the garden and flushed it through. Put it back on reverse the process.

Now the thermostat end and supply pipe are cold. And the lock shield and is warm and the radiator warms up slightly. But my system will not hold pressure.

I’ve topped it up via the filling loop all the other radiators around the house get hot, but after an hour also the pressure is back down to 0.5 bar.

Any advice any help with your hugely appreciated.

 

[cross thread]

Start by removing rad and see if you have flow from both valves ,how fast is pressure dropping ? Any chance you have disturbed a joint under the floor .