Due to the expansive nature of water in its solid form of ice we recommend the hot tub winterization process to be performed by a spa technician or professional service technician. We have outlined below the standard procedures for winterization but should remind you that cold weather provides some of the most enjoyable hot water settings throughout the year. Damages to your hot tub if winterized improperly will result in severe damage to components and is not covered under Sunbelt Spas warranty.