Aqua Glass R100VS4C Pump System Replacement

Experience a revitalized whirlpool experience with the Aqua Glass R100VS4C Pump System Retrofit Kit. Designed to replace aging, discontinued variable-speed pumps, this all-in-one upgrade fits your existing tub footprint while restoring the full power of your jets. Built by Whirly Bros, it breathes new life into baths that once relied on legacy components, delivering reliable performance you can count on.

What sets the R100VS4C apart

• Seamless compatibility — purpose-built to replace the R75VS-19-C and a broad range of legacy ITT Marlow, Gemini Plus, and Hydro Air models, ensuring a stress-free install without reworking your tub’s structure.
• Powerful, adjustable performance — a 120V, 8.5A variable-speed motor provides precise jet control, letting you drift into a gentle soak or unleash a vigorous hydro-massage with ease.
• Wave mode with multi-speed control — tailor your bathing experience to the moment, from tranquil to dynamic, with a simple keypad interface.
• Remote convenience, no deck drilling — includes a white digital variable-speed keypad that fits your tub’s existing keypad opening, plus a remote control, eliminating the need for deck-mounted hardware.
• Energy-conscious design — engineered to maximize efficiency, so you get more jet power without unnecessary energy use.
• Long-term reliability — a complete retrofit with components designed to work together, reducing maintenance hassles and future compatibility issues.

What’s included

• One 120V 8.5A Variable Speed Pump (premium replacement for ITT Marlow, Gemini Plus)
• One 120V CG AIR Control Box
• One White Digital Variable Speed Keypad (fits in your tub’s existing keypad opening)

Compatibility & installation

The Aqua Glass R100VS4C kit is engineered to replace a wide spectrum of older variable-speed systems, including the R75VS-19-C, and many ITT Marlow and Hydro Air variants. It provides a straightforward, plug-and-play installation path with a self-contained pump, control box, and keypad that work together out of the box. The remote control adds further convenience by removing the need for deck-mounted hardware or drilling, making this upgrade suitable for both DIY enthusiasts and professional installers.

Ideal for

• Homeowners with aging whirlpool baths whose original components are discontinued or hard to source
• Property managers and service technicians seeking a reliable, long-term fix that restores full jet functionality
• Anyone looking to upgrade a basic spa into a customizable hydro-massage experience

Use cases and benefits

• Enjoy a spectrum of bathing styles—from soft, bubble-rich relaxation to targeted, robust jet action for muscle relief.
• Wave mode adds a pulsating, spa-like feel that enhances overall relaxation and therapeutic benefits.
• Variable speed lets you fine-tune flow for personalized comfort, ensuring consistent jet performance even as baths age.
• The all-in-one retrofit reduces maintenance complexity and minimizes future compatibility issues compared with older, fragmented setups.

Tips for best results

• Schedule a professional electrical checkout when wiring to 120V circuits to ensure safe, code-compliant installation.
• Place the keypad within easy reach of the tub rim to maximize convenience and minimize deck wiring.
• Regularly inspect seals and connections on the self-contained kit to maintain optimal performance and prevent leaks.
• When upgrading, consider running a quick jet-cycle test after installation to verify wave mode and multi-speed responsiveness across all jets.