Can someone tell me what this does

[Laura Hardy]

This is on my bathroom radiator and I think it's been twiddled with. What does it do and what is the best setting for it.

I think its been moved because the arrows were in a different place and I have know idea which way it has been turned.

 

[SimonG]

Wheel head radiator isolation valve.

 

[leelister6]

If you turn the valve in the direction of the + symbol the temperature increases and will cool down if you turn it in the direction of the - symbol. Hope this helps

 

[Laura Hardy]

If you turn the valve in the direction of the + symbol the temperature increases and will cool down if you turn it in the direction of the - symbol. Hope this helps

That's great thank you. That's exactly what I needed to know.

 

[ShaunCorbs]

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