My outside tap has been frozen for the last few days. Unable to turn it on due to it being frozen. However, was able to turn it on this evening, but no water in it. Also, there is still no water to my washing machine in the shed. Question: Should I leave outside tap in on position with no water coming through. Also, how long should it take freezing pipes to thaw - basically I was wondering if in two or three days time I still have no water in my outside tap or coming through to my washing machine, do I need to call in a plumber? All taps, showers etc in the house are working perfectly. Thanks.