73533-AA KOHLER Variable Speed Whirlpool Pump Replacement Kit | 120V

73533-AA KOHLER Variable Speed Whirlpool Pump Replacement Kit

Restore your KOHLER whirlpool bathtub with the 73533-AA KOHLER Variable Speed Whirlpool Pump Replacement Kit. Designed by Whirly Bros, this complete retrofit system replaces discontinued KOHLER variable-speed whirlpool pump assemblies while adding modern controls, quieter operation, and customizable hydrotherapy.

Unlike the original factory system, this replacement uses a dependable CG Air Systems variable-speed control platform paired with a high-performance 120V variable-speed whirlpool pump. The result is smoother operation, improved reliability, and five massage modes that let you personalize every bath.

Why Upgrade to the Whirly Bros 73533-AA Replacement Kit?

• Complete replacement system engineered to replace discontinued KOHLER 73533-AA variable-speed whirlpool pumps.
• Variable-speed hydrotherapy allows you to select High, Medium, or Low pump speeds depending on the massage intensity you prefer.
• Wave and Pulse massage modes automatically vary water flow to create a more natural hydrotherapy experience.
• Modern CG Air Systems controller replaces aging electronics with dependable, easy-to-use technology.
• Compact white keypad features a 2.5-inch square trim that fits existing 1-inch mounting holes while covering the original opening for a clean factory appearance.
• Designed for existing plumbing with an included union fitting to simplify installation.
• Compact control box mounts neatly beneath the bathtub without taking up unnecessary space.
• Quieter operation and smoother speed transitions provide a more relaxing whirlpool experience.

What's Included

• 120 Volt Variable-Speed Whirlpool Pump (8.5 Amps)
• CG Air Systems Variable-Speed Control Box
• White Variable-Speed Keypad
• Pump Union Fitting
• Installation Instructions

System Specifications

• Replacement For: KOHLER 73533-AA
• Voltage: 120 Volts
• Amperage: 8.5 Amps
• Pump Type: Variable Speed
• Massage Modes: High, Medium, Low, Wave, Pulse
• Control System: CG Air Systems
• Keypad Color: White
• Trim Size: 2.5-inch Square
• Fits Existing Hole: 1-inch Keypad Opening

Installation Notes

This replacement kit is designed for whirlpool bathtubs wired for 120 Volts. If your bathtub is currently configured for 240V operation, electrical modifications will be required before installation.

Most installations reuse the existing plumbing connections, significantly reducing installation time. A pump union is included to simplify the final plumbing connection.

Please note: The original KOHLER pump base is not compatible with this replacement pump and must be removed during installation.

For safety, this system should always be connected to a dedicated GFCI-protected circuit.

Who Is This Kit For?

This replacement system is ideal for homeowners whose original KOHLER variable-speed whirlpool pump has failed or has become impossible to replace due to discontinued factory parts. Instead of replacing the entire bathtub, this retrofit kit restores full whirlpool functionality while providing modern controls and enhanced reliability.

Need Help Confirming Compatibility?

If you're unsure whether this is the correct replacement for your KOHLER whirlpool bathtub, contact the experts at Whirly Bros. We'll help identify your existing system and verify compatibility before you order.