K-73533 Kohler Whirlpool Bath Pump Replacement

Revive your hot tub's interior whirlpool with the K-73533 Kohler Whirlpool Bath Pump Replacement—a purpose-built upgrade that replaces the obsolete 73533-AA with modern reliability, control, and customization for your Kohler whirlpool system.

This all-in-one kit combines a variable-speed 120V motor, a compact CG AIR SYSTEMS control box, and a clean, tactile white keypad, delivering customizable jet intensity and new levels of massage variety—all while staying compatible with your existing plumbing layout.

What makes this upgrade stand out

• Precise jet control: A 120V variable-speed motor rated at 8.5 amps lets you dial in the exact intensity from High to Low, so you can tailor every spa session.
• Dynamic massage options: Wave and Pulse Modes introduce ripple patterns and pulsing action, expanding your massage repertoire beyond a steady stream.
• Compact, modern interface: Square white keypad thst fits in a 1 inch hole diameter and a 2.5" square footprint offers clean aesthetics and flexible mounting.
• Seamless plumbing compatibility: Engineered to fit the old pump’s connections, reducing install headaches and keeping your tub layout intact.
• All-in-one upgrade: Includes pump, control box, white keypad, and a free union fitting to simplify installation if needed.
• Durable, future-ready design: Modern components deliver improved longevity over legacy models, ensuring reliable spa sessions for years to come.

Included components

• 1 x 120V 8.5A Variable-Speed Pump (fits the old pump’s plumbing connections)
• 1 x CG AIR SYSTEMS Control Box (115V variable-speed operation)
• 1 x White finish Variable-Speed Keypad (2.5" square Trim)
• 1 x Free union fitting to assist with installation

Installation and setup

The pump is designed to drop into the existing Kohler tub plumbing, often without major modifications. The compact control box can be mounted beneath the tub to keep wiring tidy and accessible during maintenance. Note that the new pump base is different from the old base, so ensure a stable, secure mounting surface for optimal performance and vibration control. For safety, use a dedicated GFCI-protected circuit to power the system.

Voltage compatibility and safety

This replacement runs on 120 volts. If your hot tub system operates at 240 volts, a power-supply conversion is required before installation to prevent damage and ensure the pump operates as designed.

Why choose the K-73533 upgrade

It’s more than a plug-and-play replacement. This upgrade addresses the shortcomings of discontinued parts by delivering smoother operation, a broader range of massage options, and intuitive controls that integrate seamlessly with your existing Kohler whirlpool system. The result is a quieter, more reliable spa experience with less maintenance fuss and a longer service life than older components.

Ideal for

• Homeowners with Kohler whirlpool tubs seeking a reliable, modern pump replacement after 73533-AA or similar parts were discontinued.
• Owners who want customizable massage experiences with Wave and Pulse modes and precise jet control.
• People who value easy installation, clear wiring, and a compact control setup that fits under the tub.