Fitted my first trv yesterday using a freezer kit and no leaks overnight! I didn't fit the head though as didn't want to damage it as still got wallpaper to strip behind where the rad was. I can't take the temporary cap off because I have to turn it on to release it. Can I wait until the new rad is on to fit the trv head?
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If you fit a cap nut and rubber seai onto the valve outlet ,it will prevent water coming out if decorator cap is removed ,or loosened accidentally. And yes you can fit trv head once rad is connected up.
Once again, thank you Terry!