Welcome to the home of the spa products division of Hydro-Quip, the nations oldest supplier of portable and in-ground spa products and accessories. Hydro-Quip products are offered as original equipment by many of the industries premier spa manufacturers. We invite you to explore our web site for answers to every question you may have about spa control products. If the spa you are considering includes a Visual Diagnostic System Control, congratulations, you're about to make a smart investment. If your present spa is ready to be given a new lease on life, see why you should insist your repair professional provide only a control with the Visual Diagnostic System.