Balboa VS523DZ Spa Control System 4.0 kW [3 Pump W Blower] (54762 01) spacomponents 0 HP Ultima Wet End 0 HP Ultima Wet End is designed for compatible top center discharge applications where the original wet end no longer feels dependable 6A] [48Y SF] Pool Motor (QC1072) is engineered for pump motors applications Correct matching matters because a properly selected replacement should preserve the original logic and feature access of the spa instead of forcing the owner to adapt to a compromise A three pump spa control system with blower support can make a major difference when the original electronics no longer feel dependable