Aquatic 8078 MOTOR | ITT Marlow Gemini Plus R75A-C 3/4 HP Whirlpool Tub Pump Replacement
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Premium Replacement for Aquatic 8078 MOTOR and ITT Marlow Gemini Plus R75A-C Whirlpool Bathtub Pumps
Replace your discontinued Aquatic 8078 MOTOR or ITT Marlow Gemini Plus R75A-C whirlpool bathtub pump with this premium 3/4 HP replacement pump from Whirly Bros. Designed for many Aquatic and ITT Marlow whirlpool bath systems, this complete replacement restores strong hydrotherapy performance without the expense of replacing your entire bathtub.
If your original pump has become noisy, started leaking, seized, or stopped operating, this replacement delivers dependable performance, quiet operation, and long-lasting reliability using modern motor technology that helps save energy without sacrificing water flow.
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Quick Specifications
| Replacement For | Aquatic 8078 MOTOR / ITT Marlow Gemini Plus R75A-C |
| Product Type | Whirlpool Bathtub Pump |
| Horsepower | 3/4 HP |
| Voltage | 120V AC |
| Amperage | 8.5 Amps |
| Frequency | 50/60 Hz |
| Motor Speed | Single Speed |
| Air Switch | Built-In |
| Pump Unions | (2) Included |
| Air Switch Tubing | 6 ft Included |
| Application | Whirlpool Bathtub Systems |
| Condition | Brand New |
Why Choose This Replacement?
Modern Motor Technology
This replacement pump uses updated motor technology designed to operate more efficiently than many older OEM pumps while still delivering the strong water flow needed for proper whirlpool performance.
Modern efficiency does not mean weaker performance. This replacement is designed to maintain the jet pressure and water movement your whirlpool bathtub requires.
Complete Installation Kit Included
- (1) ITT Marlow Gemini Plus R75A-C 3/4 HP Replacement Pump
- (2) Pump Unions
- (1) 6-Foot Air Switch Tubing
Common Signs Your Pump Needs Replacement
- Loud motor or bearing noise
- Water leaking from the pump seal
- Pump hums but will not start
- Weak jet pressure
- Motor overheating
- Pump repeatedly trips the GFCI
- Cracked or damaged wet end
- Reduced whirlpool performance
OEM Cross Reference
- Aquatic 8078 MOTOR
- ITT Marlow Gemini Plus R75A-C
Installation Overview
- Disconnect electrical power.
- Drain the whirlpool bathtub.
- Remove the existing pump.
- Install the supplied pump unions.
- Reconnect plumbing.
- Attach the included air switch tubing.
- Restore power and test for leaks and proper operation.
Whirly Bros Expert Tip
We have replaced many Aquatic and ITT Marlow Gemini Plus pumps over the years. While this pump is a replacement for many Aquatic 8078 MOTOR and ITT Marlow Gemini Plus R75A-C applications, it is still important to verify your original pump label, voltage, amperage, plumbing orientation, and air switch configuration.
If you are unsure, send us a photo of your existing pump label and plumbing layout before ordering. Our team can help confirm compatibility so you receive the correct replacement the first time.
Modern motor technology provides excellent water flow while operating quieter, more efficiently, and producing less heat than many aging OEM motors.
Why Buy From Whirly Bros?
Whirly Bros specializes in whirlpool bathtub replacement parts—not hot tubs or swimming pools. We help homeowners, plumbers, contractors, hotels, property managers, and service technicians identify discontinued pumps and replacement components every day.
- Expert product identification
- Whirlpool bathtub parts specialists
- Fast order processing
- Same-day shipping on most in-stock orders
- Free U.S. shipping on qualifying orders
- Friendly technical support before and after your purchase
Frequently Asked Questions
Is this a replacement for the Aquatic 8078 MOTOR?
Yes. This pump is commonly used as a premium replacement for the discontinued Aquatic 8078 MOTOR.
Does this replace the ITT Marlow Gemini Plus R75A-C?
Yes. It replaces many ITT Marlow Gemini Plus R75A-C whirlpool bathtub pumps.
What are the electrical specifications?
This pump is rated at 120V AC, 8.5 Amps, 50/60 Hz, and 3/4 HP.
Does this pump include unions?
Yes. Two pump unions are included.
Does it include air switch tubing?
Yes. A 6-foot length of air switch tubing is included.
Is the air switch built into the pump?
Yes. This pump includes a built-in air switch for operation with an air button.
Will this fit every Aquatic whirlpool bathtub?
No. Compatibility depends on your original pump label, plumbing layout, and air switch configuration.
Customers Also Purchase
- Whirlpool Tub Air Buttons
- Air Switch Tubing
- Pump Union Gaskets
- Whirlpool Tub Heaters
- Replacement Control Systems
- Whirlpool Tub Plumbing Fittings
