Spa or Hot Tub staying wet more on the outside than the inside? Then it may be time to fix that plumbing leak in your tub. Plumbing Components for all types, shapes and sizes of Spas. Check out our selection of Valves such as Ball, Check, Diverter and Slide. Skimmer parts and pieces along with Suction Fittings. Sundance Spas Plumbing parts for air controls, Diverter Valves, Skimmer Weirs, Drain and Suction Fittings, Handrails, Pump Unions, Manifolds for water and air systems.