To winterize your plumbing system and prevent freezing and bursting, insulate exposed pipes, seal any gaps or cracks, disconnect and drain outdoor hoses, close exterior faucets, and open indoor faucets to allow a slow drip. Set the thermostat to a consistent temperature, particularly at night. If you’re away, shut off the main water supply and consider using heat tape or a space heater near vulnerable pipes. Proper winterization will ensure your plumbing stays protected during cold weather.