Blocking off Pipes While Radiator is Removed

[Towers84]

Fairly rookie question but I am finding it difficult to confirm the part I need and what they are actually called. We are removing a radiator while we re plaster and decorate a room. We would like to continue using the heating system while this is being done.

My girlfriend returned with compression stop ends after getting advice from the staff.

I thought we would need something more like these:
https://www.screwfix.com/p/15mm/55441


Also not sure how to be sure of the size required.

Could someone point me in the right direction?

Cheers,

[ericmark]

Most thermostatic radiator valves (TRV) come with plastic head so you can turn them off when removing the radiator, I made a mistake when removing one once I turned the valve down to minimum removed radiator and no leaks, then over night the temperature dropped and the valve opened on the frost stat setting.