R75A-C 3/4 HP Whirlpool Tub Pump Replacement – Compatible with ITT Marlow® Gemini Plus® Systems
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OEM-Quality Replacement for Discontinued ITT Marlow Gemini Plus Whirlpool Bathtub Systems
Restore your whirlpool bathtub with the ITT Marlow Gemini Plus R75A-C 3/4 HP Whirlpool Tub Pump Replacement from Whirly Bros. This premium replacement restores reliable hydrotherapy performance using modern motor technology while maintaining the powerful water flow your whirlpool bathtub was designed to deliver. If your original pump has become noisy, started leaking, seized, or stopped working, there's usually no need to replace your bathtub—simply replace the pump and enjoy your whirlpool again.
Quick Specifications
| Replacement For | 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 |
| Power Cord | Factory Installed |
| Application | Whirlpool Bathtub Systems |
| Condition | Brand New |
Why Choose This Pump?
- Direct replacement for ITT Marlow Gemini Plus R75A-C
- Modern high-efficiency motor
- Maintains strong hydrotherapy water flow
- Quiet, smooth operation
- Built-in air switch
- Long service life
- OEM-quality construction
- Complete installation kit included
Modern Motor Technology
This replacement utilizes updated motor technology that operates more efficiently than many older OEM pumps while delivering the strong water flow needed for proper whirlpool performance.
- Improved electrical efficiency
- Lower operating temperatures
- Smooth, quiet operation
- Reliable hydrotherapy performance
- Long service life
- Reduced maintenance
Modern efficiency does not sacrifice performance. This pump is designed to maintain the water flow and jet pressure your whirlpool bathtub requires.
What's Included
- (1) R75A-C Replacement Pump
- (2) Pump Unions
- (1) 6-Foot Air Switch Tubing
Common Symptoms of a Failed Pump
- Loud bearing noise
- Water leaking from the shaft seal
- Pump hums but won't start
- Weak jet pressure
- Motor overheating
- GFCI trips
- Cracked wet end
- Burning electrical smell
- Excessive vibration
Why Replace Instead of Rebuilding?
Many original ITT Marlow pumps are now over 20 years old. While replacing bearings or seals may temporarily restore operation, other components such as the motor windings, capacitor, and shaft may also be worn.
- Brand-new motor
- Brand-new wet end
- Updated motor technology
- Improved reliability
- Quieter operation
- Longer service life
Compatible Whirlpool Tub Manufacturers
Commonly found in select models from:
- Aqua Glass
- American Standard
- Hydro Systems
- Jason International
- Lasco
- Maax
- MTI Baths
Always verify your original pump label before ordering.
OEM Cross Reference
- ITT Marlow Gemini Plus R75A-C
Installation Overview
- Disconnect power.
- Drain the bathtub.
- Remove the existing pump.
- Install the included unions.
- Connect plumbing.
- Attach the supplied air switch tubing.
- Restore power and test for leaks.
Professional installation is recommended if you are unfamiliar with whirlpool bathtub electrical or plumbing systems.
Trademark Disclaimer: ITT®, Marlow®, and Gemini Plus® are trademarks of their respective owners. Whirly Bros is not affiliated with, endorsed by, or sponsored by the trademark owners. These names and model numbers are used solely to identify the intended application and compatibility of this aftermarket replacement pump. This product is independently manufactured as a compatible replacement and is not an original ITT, Marlow, or Gemini Plus product
Whirly Bros Technician Notes
We've replaced hundreds of legacy ITT Marlow and Gemini Plus pumps over the years. One of the biggest mistakes we see is customers ordering solely by horsepower. Always verify voltage, amperage, plumbing orientation, and pump configuration.
Many customers also ask whether newer pumps produce the same jet performance. In our experience, they do. Modern motor technology provides excellent water flow while operating quieter, more efficiently, and with less heat than many aging OEM motors.
If you're unsure, send us a picture of your existing pump label and we'll help identify the correct replacement before you order.
Why Buy From Whirly Bros?
Whirly Bros specializes exclusively in whirlpool bathtub replacement parts. We help homeowners, plumbers, contractors, hotels, and maintenance professionals identify discontinued parts every day.
- Expert product identification
- OEM-quality replacement parts
- Same-day shipping on most in-stock orders
- Free U.S. shipping on qualifying orders
- Friendly technical support
- Real-world installation experience
Frequently Asked Questions
Is this a direct replacement for the ITT Marlow Gemini Plus R75A-C?
Yes. It is designed as an OEM-quality replacement for many discontinued R75A-C pumps.
Does it include pump unions?
Yes. Two pump unions are included.
Does it include air switch tubing?
Yes. A 6-foot length is included.
Is the air switch built into the pump?
Yes.
Is this pump more energy efficient than my original?
Yes. It uses modern motor technology while maintaining the water flow needed for proper hydrotherapy.
Will this fit every whirlpool bathtub?
No. Compatibility depends on your original pump. Contact us with photos before ordering if you're unsure.
Do I need to replace my bathtub if my pump fails?
Usually not. Replacing the pump is far more affordable and restores your existing whirlpool system.
How quickly will my order ship?
Most in-stock orders ship the same business day.
Customers Also Purchase
- Whirlpool Tub Air Buttons
- Air Switch Tubing
- Pump Union Gaskets
- Whirlpool Tub Heaters
- Replacement Control Systems
- Whirlpool Tub Plumbing Fittings
