Care of Water System in Winter
Care must be exercised in draining the water system in cold weather. It is important that the drain cock should be closed after draining for if this is not done the radiator may freeze up anyway, and when the radiator is next filled no water will drip from it until after the start has been made, and then the drain will thaw out and all the cooling water run off. In filling after the draining, the drain cock should be left open a minute to allow the incoming water to push the air into the pipes. Many fill the radiator with hot water to facilitate starting.