The rad that was getting the new valves was already off the wall, so yeah I just undid the valve I wanted to change slowly, caught all the water in a paint tray. Took a while to de-pressurise.
All working and hot. Now to re-balance and add inhibitor...the next fun stage!
The learning...
So I went ahead and did it without touching the isolation valves on the boiler, didn't see your message Elkato.
I partially drained the system. This was my method:
- turn off boiler and thermostat
- turn off both valves on all rads and note turns on lockshield
- release pressure on bleed valve...
Thanks so much for all for the comments. I did consider a pipe freezing kit
Elkato531 - this sounds like the kind of solution I am after. The boiler is a Glowworm Energy 7 30C. Would be grateful if you could please confirm if it would be safe to do?
So I would close the flow and return under...
I'm going round and round in circles looking for the simplest method to replace the TRV and lockshield valve on a downstairs radiator. I have a combi boiler.. The rad is currently off the wall as we are decorating.
Is my only option to fully drain the system? Can I partially drain and then...