To drain an inflatable hot tub, check the owner's manual for the manufacturer's instructions. In most cases, you will be required to turn off the electric supply before unplugging it. After that, attach a standard garden hose if the tub didn't come with one. Most inflatable hot tubs come with simple adapters to which you can easily attach the hose. Put the hose's furthest end into the drain or space where you wish the water to go. Turn back the valve, allowing water to drain from the tub until it is empty. Thoroughly clean it and refill with fresh water. After covering it, reheat the water and use it.