SOPHISTICATED DESIGN, PREMIUM PRODUCTION. Hot Spring® spas are the world's number one selling brand and have been the market leader since 1977. They're made by Watkins Manufacturing, one of Masco Corporation's family of companies whose products you trust in your home for quality and value—Delta® faucets, Baldwin® hardware, Merillat® cabinets, and many more. The makers of Hot Spring spas are the only three-time recipient of the spa industry's prestigious John Holcomb Silver award for technological innovation. We meticulously design our spas using the most advanced computerized systems available.