ITT Marlow Gemini Plus R100A-C 1 hp 120v Air Switch w/cord

Reclaim the full spa experience with the ITT Marlow Gemini Plus R100A-C 1 hp 120V air switch pump—a purpose-built replacement that restores robust water flow, precise control, and soothing hydro-massage without a lengthy repair project. This complete kit is designed for a fast, straightforward installation and dependable performance from day one.

• Powerful, reliable performance — 1 horsepower motor operating at 120V with an 8.5A draw delivers strong water flow for a satisfying, studio-grade massage.
• Built-in air switch with cord — control your whirlpool functions from a convenient, at-hand location without reaching behind the cabinet.
• Complete replacement kit — includes the pump, a pump union, and fresh tubing for the air switch so you don’t have to source extra parts separately.
• Easy installation — designed as a direct replacement for common Whirlpool spa pumps, reducing downtime and simplifying upgrades.
• Durable, long-lasting construction — built to withstand the damp, demanding environment of a home spa for years of dependable service.
• Versatile compatibility — engineered to work with a broad range of Marlow Gemini Plus and related models, expanding your replacement options.

What’s included and what it powers

• R100A-C Replacement Pump for Whirlpool Tubs (8.5A, 120V)
• Integrated air switch with cord for convenient control
• Pump union and new tubing specifically for the air switch

Why this pump matters for your bath — If your whirlpool is missing its therapeutic jets or the original pump has failed, this ITT Marlow Gemini Plus R100A-C solution restores consistent water flow and dependable performance. The combination of a robust motor, integrated control, and a thoughtfully designed kit means faster installation, fewer parts to source, and a calmer, more enjoyable soak from day one.

Ideal for — Home spa enthusiasts restoring older Whirlpool tubs, repair technicians seeking a compatible, ready-to-install pump, and anyone looking to preserve or upgrade their hydrotherapy experience without a full tub overhaul.

Compatibility and installation considerations — This unit is a direct replacement compatible with a variety of Whirlpool/Marlow configurations, including but not limited to HD10A-C, R100-C, R150A-C, R150-C, NRU variants, and several NRU/NLR lines. The included air switch tubing and pump union simplify mounting and connection, while the built-in air switch keeps controls easily accessible. An optional variable speed control can be added separately to customize flow and massage intensity beyond the base pump performance.

To get the best results, verify your tub’s model matches the replacement interface and plan the layout before installation. Always pull power at the breaker before beginning any work for a safe, smooth upgrade.