Iíve got a 13 year old stand-alone Catalina Spa. The gaskets in the air control valves have denigrated, most likely from dry rot. Iíve lubed the remaining one with Jackís Formula 327. Without these little pieces of silicon, the air bubbles wonít turn on/off. Iíve been unable to locate new gaskets. Iíve contacted the dealer where the spa was purchased, the spa manufacturer, and several spa parts depots with no luck. The only P/N on the air control valve is for the plunger (662-2140) and the partís manufacturer is unknown. The P/N leads me to believe that it may be a Hydro Air or Waterway Air Control assembly. Iíve attached photos in the hope that someone will be able to point me in the right direction.