Live in New England and it is getting cold. Have two outside faucets/hosebibs that do not have an interior shutoff valve. Have removed hoses and insulated both from inside. Also made two small styrofoam box's and attached over each to elimnate/reduce windchill. Is it imperative that you have a shutoff? (Both sillcocks have a plastic screw cap on top, which I have opened). Anything else I can do besides keeping an ear for running water??