Has the ball in your air control become stuck, or has it started to “whistle?” It is most likely time to replace it. Master Spa Parts has the perfect replacement part for you. The 1-Inch, MG Air Control w/ Blower Assist Tee is compatible with spas and hot tubs that accept a one-inch air control.
The pressure switch - MAS400 - is specifically designed to replace the original pressure switches in the Legend Series Master Spas 2000 CS models. Control the water pressure in your spa with the right part.