The lockshields on my rads are the old type where you need a square key to open or close them.
Is there some kind of key that I need to buy? Alternatively, can I use a spanner to remove the shroud that covers the square valve head, then turn it with a spanner, or will this cause the valve to leak?
Is there some kind of key that I need to buy? Alternatively, can I use a spanner to remove the shroud that covers the square valve head, then turn it with a spanner, or will this cause the valve to leak?