Hello and welcome Norman, to the best DIY'r site on the web.
Repair of a frozen valve is not possible, there is a good change that the pressure of the ice has deformed the valve, replace it, and next winter ensure it is drained completely so as not to cause the issue again.
Mark
Repair of a frozen valve is not possible, there is a good change that the pressure of the ice has deformed the valve, replace it, and next winter ensure it is drained completely so as not to cause the issue again.
Mark
