We have a house in Cape May, NJ that is primarily used in the summer. It is a one story house with a crawl space and Polybutylene plumbing and I am told cannot be wrapped with heat tape. During these cold months when we are not there I am concerned about the pipes freezing. Is there an electric shut off valve that can be turned on and off from inside the house that would shut the water off at the main?Any help is appreciated.