From Watkins Manufacturing, the makers of Hot Spring Spas and Caldera Spas. Designed for Hot Spring Hot Spot Series spas from 2010-2014 and Caldera Vacanza Series spas from 2010-Current
- Hot Spot Relay
- Hot Spot Rhythm
- Hot Spot Tempo
- Vacanza Palatino
- Vacanza Marino
- Vacanza Vanto
- Vacanza Aventine
- Vacanza Celio
- Vacanza Tarino
- Additional Vacanza models