The 0034F00C GEMINI PLUS II BALBOA WHIRLPOOL PUMP is the smart, reliable replacement you need when Balboa’s Gemini II pump model has been discontinued. It’s engineered by a new manufacturer to preserve the jet power and consistent circulation your spa or hot tub relies on, while embracing a modern package that fits your cabinet space with minimal fuss.

Why this Gemini Plus II pump stands out

• Purpose-built replacement for a broad range of Balboa Gemini II models, delivering familiar performance in a refreshed form factor.
• Flexible horsepower options: starts at ¾ HP and can be upgraded to 1.25 HP (upgrade part 0060F88C) for higher jet flow when your spa demands more performance.
• Single-speed by default, with upgrade-ready versatility out of the box; pair with Balboa’s Variable Speed Control System to achieve smooth low-to-high modulation for quieter operation and energy savings.
• Ready-to-install hardware includes Pump Union and new tubing for the air switch (0034F88C), minimizing downtime and easing the installation process.
• Broad compatibility designed to fit spas and tubs that previously used 0034F88C, 0036F00C, NRU2A-C, 0035F00C, and related models, reducing the guesswork during replacement.

What’s inside and how it works

• Core design Gemini II–style pump built for 120V, 50-60Hz operation with a compact footprint that slides into standard spa cabinets.
• Included fittings pump union and air-switch tubing (0034F88C) are part of the package to streamline installation without hunting for extra parts.
• Power and speed flexibility baseline ¾ HP with an upgrade path to 1.25 HP, letting you tailor flow to your jet package and spa size.
• Control and performance standard single-speed operation; for variable-speed performance, pair with Balboa’s Variable Speed Control System to get gradual, quieter flow adjustments.

Key specifications at a glance

• Horsepower: ¾ HP (base) and 1.25 HP upgrade option available
• Speed: single-speed by default; variable-speed with the appropriate Balboa control system
• Voltage: 120V
• Frequency: 50-60Hz
• Dimensions: Length 12-11/16" (12.6875"), Width 5-11/16" (5.6875"), Discharge Height 7-3/4" (7.75")
• Replaces: a broad range of Balboa Gemini II models and equivalents, simplifying the replacement process

Ideal use cases

• Replacing a discontinued original Gemini II pump in spas and hot tubs that use Balboa controls, restoring familiar jet power and circulation.
• Upgrading to higher flow when your jet package requires more performance by switching to the 1.25 HP configuration.
• Systems that need a straightforward, compatible replacement with included air-switch tubing and union fittings to minimize downtime.

Practical installation tips

• Before installing, compare the new unit’s footprint and discharge height with your existing pump housing to confirm a smooth fit.
• For variable-speed operation, plan to install Balboa’s Variable Speed Control System to unlock a wide range of flow settings, which translates to smoother jets and better energy efficiency.
• Ensure proper alignment of the pump union fittings and air-switch tubing (0034F88C) to prevent leaks and secure connections right away.
• Check that your spa’s electrical setup matches the 120V, 50-60Hz requirements to avoid compatibility issues.

The 0034F00C GEMINI PLUS II BALBOA WHIRLPOOL PUMP delivers dependable, adaptable performance for Balboa-equipped spas and hot tubs. With a clear upgrade path, included install-ready hardware, and compatibility across multiple Gemini II models, it’s designed to keep your jets buzzing and your circulation steady—long after the original pump is no longer available.