Draining a Caldera hot tub allows you to fill it with fresh clean water, sanitize the tub or store it for the winter. The specific directions for draining a Caldera hot tub vary slightly by model, but all spas from this manufacturer have a main drain valve that you use to drain the water. It's especially imperative to drain water from your Caldera tub if you notice cloudy water, odors or a buildup of oils and dirt, since these are indicative of bacterial growth.
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Unplug the hot tub's power cord or turn the power off.
Pull the handle of the main drain valve out. Turn it until about 1 inch of the drain tube is exposed. On some models, you may need to only twist off the drain cap.
Twist off the drain cap located on the handle.
Connect a garden hose to the end of the drain tube and tighten it.
Direct the open end of the garden hose to a drain.
Push the garden hose and the drain tube back into the valve opening to start draining the water. Gravity pulls the water through the hose.