Replace rad valves - best method

[spoons2624]

My apologies. Turn off with an adjustable spanner. Quarter turn.

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 (I did this on the closest rad I was working on, as rad was off the wall for decorating)
- changed TRV and lockshield valves

Then I refilled the system, don't think I did it in the correct order...I would appreciate any comments?

- turn boiler back on
- repressurise boiler
- open all rad valves, starting downstairs (fully open TRV, lockshield to required number of turns)
- bleed all rads, starting downstairs
- run heating for 15 mins
- rebleed all rads

I will put in some inhibitor shortly. Any comments guys?

 

[Madrab]

Nothing wrong with that. I take it you did drain the rad that was getting the new valves and then de-pressurised the system using the valves or did you fd o that with the bleed valve? If so then that must have taken a while?

All done now though and all working and hot?

 

[spoons2624]

Nothing wrong with that. I take it you did drain the rad that was getting the new valves and then de-pressurised the system using the valves or did you fd o that with the bleed valve? If so then that must have taken a while?

All done now though and all working and hot?

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 continues.. thanks for all you help.