Winterizing may include, but is not limited to: draining hot water tanks, commodes, and all water lines; use of an air compressor to flush water lines and pressure-test system for possible leaks; adding antifreeze to all commodes, sinks, drains and traps. We zip-tie the water main in the closed position. Plus put winterization notices on ALL fixtures will be clearly posted containing the date of the winterization and contact information.