Balboa VS510SZ spa control box and heater (no topside or cords). You can also purchase the VS510SZ as a kit with topside.
The Balboa VS510SZ control system can operate:
**Most spas don't have a small circulation pump, instead, the main pump runs on low speed to heat and filter the water during set filtration cycles. If you are using a small circulation pump, the flow rate must be at least 25 gallons per minute.
Compatible topside control (not included): Part number: 51247 (VL701S) and others (contact us).
This pack was commonly used on Hydro Spas, Platinum Hot Tubs and replaces Costco's part number; Balboa 55098.