This morning we woke up to a running water noise. When we got up to check it out water was shooting out from under the sink. The shut off valve had come off the hose. It has gone through the walls and into our bathroom. The bathrooms back up to one another. My questions are 1. is it normal for a shut off valve to come undone? (house is going on 7 years) 2. What are our steps in fixing this? 3. Should we worry about the water inside the floor btwn the two rooms? We have 4 children and HAVE to have water since we have a 2 month old in the house. ANY help on this subject matter would be appreciated.