Whether or not you drain the water supply to your home before vacating it may depend on the duration of absence and the time of year. While stopping the water supply can prevent risks like burst pipes and flooding, it can also leave your home susceptible to cold temperatures and the negative effects, such as dampness and mould. If you are leaving the property for a short period during the summer, it may be sensible to drain the water supply, while this may not be the best idea when leaving a property for a whole winter.