The hot tub looks great, but it only worked for 1 day before making a high pitched noise when turned on. The company sent a new motor and said to drain the tub and hook up the new motor. However, the tub will only drain about half way. The representative said that this is normal and suggested purchasing a pump to drain the rest. Can anyone confirm that this is true? It just doesn't seem right that the tub would not be capable of draining all or most of the way! Thanks!