Description
Aquatic 8078MOTOR, ITT Marlow Gemini Plus R75A-C ¾ hp 120v Air Switch, Cord
Upgrade or restore your Balboa spa system with a reliable, ready-to-install pump assembly. The Aquatic 8078MOTOR combos the ITT Marlow Gemini Plus R75A-C with a ¾ hp single-speed motor and a 12-11/16" cord, delivering consistent water flow for comfortable, jet-rich bathing experiences. Built to suit Gemini Plus II configurations, this unit is a practical, long-lasting replacement that keeps your hot tub or bath running smoothly.
Why this pump stands out
- Gemini Plus II compatibility: specifically designed as a complete Bath Pump replacement for Balboa/ Gemini Plus control systems, ensuring a seamless fit and reliable operation.
- Compact, install-friendly design: overall height 7-3/4" and width 5-11/16" optimize space behind spa cabinets while maintaining strong performance.
- Power and performance: ¾ hp, 1-speed (Speed 1) operation provides steady water movement for jets, circulation, and spa ambiance without fuss.
- Robust connections: suction and discharge both use 1-1/2" pipe sizes with 2-7/16" outer diameter MBT (male buttress thread) fittings for secure, leak-resistant hookups.
- Bottom suction, footless design: easy installation under most spa cabinets and accommodates a clean, uncluttered plumbing layout.
- Integrated air switch with cord: simplifies control wiring and offers reliable power activation in a spa-ready package.
- California Title 20 compliant: supports energy-efficiency standards while delivering dependable spa performance.
Key specifications at a glance
- Manufacturer: Balboa Water Group
- Complete pump type: Bath Pump
- Pump model: Gemini Plus II
- Horsepower: 0.75 hp
- Motor voltage: 115V (listed in technical specs) with a 120V air-switch assembly in the included configuration
- Speed: 1-Spd (single-speed)
- Drain Plug Location: None
- Suction Style: Bottom Suction
- Connection Type: Male Buttress Thread (MBT)
- Suction Pipe Size: 1-1/2"
- Discharge Pipe Size: 1-1/2"
- Suction Connection OD: 2-7/16"
- Discharge Connection OD: 2-7/16"
- Discharge Connection: MBT
- Cord Length: 12-11/16"
- Volute Fastening: 4 Screws
- Overall Height: 7-3/4"
- Discharge Height: 7-3/4"
Installation and practical use
This pump is designed for straightforward replacement in spas that use the Gemini Plus II control system. With footless bottom suction and a center discharge arrangement, it integrates cleanly with standard 1-1/2" plumbing. The 4-screw volute ensures a secure, serviceable seal, while the MBT fittings provide robust, easy-to-tighten connections. The included 12-11/16" cord and integrated air switch simplify installation and reduce setup time, so you can get back to enjoying your spa sooner.
Who this is for
- Spa owners needing a reliable, direct-fit replacement for a Gemini Plus II bath pump
- Technicians performing routine maintenance or mid-life pump upgrades in Balboa-equipped hot tubs
- Anyone seeking a compact, space-efficient pump with consistent single-speed performance for jets and circulation
How this pump compares to alternatives
Compared to generic replacements, the Aquatic 8078MOTOR is purpose-built for Balboa/ Gemini Plus systems, ensuring precise fit, wiring compatibility, and control integration with an air-switch setup. Its ¾ hp single-speed design prioritizes dependable flow over variable-speed complexity, which is ideal for standard spa applications that rely on consistent jet performance rather than high-speed pumping. The combination of bottom suction, MBT connections, and a compact footprint makes installation smoother in tight spa cabinets.
Practical tips and insights
- Before installation, verify cabinet clearance to accommodate the 7-3/4" height and ensure the cord can reach the control area without strain.
- Check MBT fittings for a clean, threaded seal to prevent leaks at both suction and discharge connections.
- When replacing an older pump, use the same 1-1/2" piping size to avoid adapting fittings and minimize potential flow loss.
- Periodic inspection of the air switch assembly can prevent nuisance tripping and extend pump life.
- Length = 12-11/16"
- Width = 5-11/16"
- Discharge Height = 7-3/4"
- Overall Height = 7-3/4"
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California Title 20 Compliant
| Manufacturer | Balboa Water Group |
| Complete Pump Type | Bath Pump |
| Pump Model | Gemini Plus II |
| Speed | 1 Speed (1-Spd) |
| Motor Voltage | 115v |
| Drain Plug Location | None |
| Pump to Motor Foot Types | Footless |
| Suction Style | Bottom |
| Suction Connection Type | Male Buttress Thread (mbt) |
| Suction Pipe Size | 1-1/2" |
| Suction Connection (Physical Dimension) | 2-7/16"od |
| Discharge Style | Center |
| Discharge Connection Type | Male Buttress Thread (mbt) |
| Discharge Pipe Size | 1-1/2" |
| Horsepower | 0.75hp |
| Discharge Connection (Physical Dimension) | 2-7/16"od |
| Motor Amperage/Wattage | 8.5A |
| Volute Fastening Type | 4 Screws |
| Manufacturer | Balboa Water Group |
| Complete Pump Type | Bath Pump |
| Pump Model | Gemini Plus II |
| Speed | 1 Speed (1-Spd) |
| Motor Voltage | 115v |
| Drain Plug Location | None |
| Pump to Motor Foot Types | Footless |
| Suction Style | Bottom |
| Suction Connection Type | Male Buttress Thread (mbt) |
| Suction Pipe Size | 1-1/2" |
| Suction Connection (Physical Dimension) | 2-7/16"od |
| Discharge Style | Center |
| Discharge Connection Type | Male Buttress Thread (mbt) |
| Discharge Pipe Size | 1-1/2" |
| Horsepower | 0.75hp |
| Discharge Connection (Physical Dimension) | 2-7/16"od |
| Motor Amperage/Wattage | 8.5A |
| Volute Fastening Type | 4 Screws |