Custom hot tubs and swim spas made right here in Indiana. For fun or hydrotherapy, our innovative engineering brings the best of both fitness and relaxation together. Slip into a Royal Spa hot tub and the sense of ...ahhh envelops you. Aches, pains and stress melt away. Some hot tubs are built to sell, some are engineered to own. Royal Spa hot tubs and spas are built strong, operate more efficiently, cost less to service and cost less to own. Additionally, we manufacture saunas, gazebos, whirlpool baths, float tanks, and baptistries. We take pride in offering expertly engineered equipment with many unique features found only in Royal Spa products. We began manufacturing spas and accessories in Indianapolis, Indiana in 1981.