Swamp Cooler Owners - have your swamp cooler winterized. Because your evaporative cooler has a water supply line that is connected to it, you should winterize it to protect it from bursting should there be a freeze during the winter months. Your evaporative cooler has metal working parts that as you know water and metal after time will rust. All through your cooler may have a plastic parts in the reservoir section of your cooler, there are other parts such as your water circu