Compatible Spa Configurations

This retrofit kit is designed for small to medium hot tubs using Balboa-style control systems.

Typical configuration:

• Pump 1 (1 or 2 speed)
• Pump 2 (1 speed) or blower
• optional circulation pump
• ozone system
• spa light

Often used to replace older systems such as:

• Balboa G4311 systems
• older Balboa VS series systems (when wiring and heater connections match)

⚠️ Important:
Always verify:

• heater union size
• pump voltage
• wiring configuration
• topside panel cutout size

before ordering.

Common Problems This Part Fixes

Replace your spa control system if you experience:

• spa not heating
• control panel not responding
• spa pack failure
• circuit board damage
• breaker trips when spa runs
• intermittent spa shutdown
• outdated spa electronics

Upgrading to the Balboa BP100 control system restores reliable spa operation with modern digital controls.

Installation Notes

• Designed as a retrofit replacement control system
• Electrical wiring must match the spa configuration
• Heater plumbing must match the existing heater union size
• Topside panel may require the included adapter plate

Professional installation is recommended for electrical safety.

Part Number Reference

This product may appear under multiple part numbers depending on the distributor.

Common identifiers include:

• 50-BP1-200-55-K
• G6502
• Balboa BP100 Control System Retrofit Kit

If your existing spa pack references one of these numbers, this system may be a compatible replacement.

Important Heater Note

⚠️ This model includes a 5.5 kW heater.

Some spas use a 4.0 kW heater version of this system.

If your spa originally used a 4.0 kW heater, you may need model:

50-BP1-200-40-K

Verify heater wattage before ordering.

How to Identify Your Existing Spa Control System

Before replacing your spa control pack:

1. Locate the label on your current spa pack

2. Identify the model number or part number

3. Confirm the number of pumps in your spa

4. Verify the heater voltage and plumbing connections

5. Measure the topside panel cutout

If you're unsure, contact our spa parts experts before purchasing.

FAQ

How do I know if this control system fits my spa?

Verify the pump configuration, heater connections, and voltage requirements of your existing spa system before ordering.

Can this replace my old Balboa control pack?

Yes, this retrofit kit is commonly used to replace older Balboa systems such as G4311 and similar configurations, provided the electrical and plumbing connections match.

Can homeowners install this control system?

Experienced DIY spa owners may install this kit, but professional installation is recommended due to electrical wiring requirements.

What if I order the wrong spa control system?

Contact our support team before ordering if you're unsure. We can help verify compatibility.

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