1. Product Overview
The Taco 006-036RP is a replacement cartridge specifically designed for use with Taco 00-series circulators, particularly the 006-IFC models. This cartridge is a critical component that restores the performance and efficiency of your circulator pump, ensuring reliable hydronic heating system operation. It is engineered to maintain the high flow and medium head capabilities of the original unit, providing a cost-effective solution for extending the life of your existing circulator.

Image showing the Taco 006-036RP Replacement Cartridge, a key component for maintaining Taco 00-series circulators.
2. Compatibility
This replacement cartridge is compatible with the following Taco 00-series circulator models:
- 006-B5A-IFC
- 006-B6-2IFC
- 006-B6-3IFC
- 006-B6-4IFC
- 006-B6-IFC
- 006-B6Y-1IFC
- 006-B6Y-IFC
Ensure your existing circulator model matches one of the listed compatible units before proceeding with installation.
3. Safety Information
WARNING: Always disconnect power to the circulator and shut off water supply before attempting any installation or maintenance procedures. Failure to do so may result in electric shock, burns, or property damage.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure the system is depressurized and cooled before working on it.
- If you are unsure about any step, consult a qualified HVAC professional.
- Follow all local plumbing and electrical codes.
4. Installation
This section outlines the general steps for replacing the cartridge in a compatible Taco 00-series circulator. Specific procedures may vary slightly depending on your system configuration.
- Prepare the System:
- Turn off the electrical power to the circulator at the main breaker. Verify power is off using a voltage tester.
- Close the isolation valves on both sides of the circulator to prevent water flow.
- If no isolation valves are present, you may need to drain a portion of the heating system.
- Allow the system to cool down if it has been operating.
- Drain the Circulator:
- Place a pan or bucket beneath the circulator to catch any residual water.
- Carefully open the drain valve (if present) or loosen a union connection to drain water from the circulator housing.
- Remove the Old Cartridge:
- Locate the screws or bolts that secure the circulator housing cover or motor assembly.
- Remove these fasteners.
- Carefully pull the motor assembly away from the volute (pump body). The old cartridge will typically be attached to the motor assembly or remain in the volute.
- Remove the old cartridge and discard it properly.
- Install the New Cartridge:
- Ensure the new Taco 006-036RP cartridge is clean and free of debris.
- Inspect the O-ring or gasket on the new cartridge and ensure it is properly seated.
- Carefully insert the new cartridge into the volute or onto the motor assembly, ensuring it aligns correctly.
- Reattach the motor assembly to the volute, ensuring the gasket is properly seated and the fasteners are tightened evenly. Do not overtighten.
- Refill and Bleed the System:
- Close any drain valves or tighten loosened connections.
- Slowly open the isolation valves to refill the system.
- Bleed any air from the system using air vents or bleed valves until a steady stream of water is observed.
- Check for leaks around the circulator.
- Restore Power:
- Once the system is refilled and bled, and no leaks are present, restore electrical power to the circulator at the main breaker.
- The circulator should now operate normally.
5. Post-Installation Operation Check
After installing the replacement cartridge and restoring power, observe the circulator's operation:
- Listen for Noise: The circulator should run smoothly with minimal noise. Excessive noise, grinding, or rattling may indicate air in the system or improper installation.
- Check for Flow: Verify that water is circulating through the heating system. You may feel warmth in the pipes downstream from the circulator.
- Monitor for Leaks: Continuously check all connections for any signs of water leakage.
- System Performance: Ensure the heating system is functioning as expected, providing adequate heat to the zones it serves.
6. Maintenance
The Taco 00-series circulators, including those using the 006-036RP cartridge, are designed for minimal maintenance. The cartridge itself is a sealed unit and does not require lubrication or internal servicing. However, regular system checks are recommended to ensure optimal performance and longevity of your heating system:
- Annual System Inspection: Have a qualified technician inspect your entire hydronic heating system annually.
- Check for Leaks: Periodically inspect the circulator and surrounding piping for any signs of leaks.
- Monitor System Pressure: Ensure your heating system maintains appropriate operating pressure as specified by your boiler manufacturer.
- Bleed Air: If you notice gurgling sounds or reduced heating performance, bleed air from the system as needed.
7. Troubleshooting
If you encounter issues after replacing the cartridge, consider the following troubleshooting steps:
- Circulator Not Running:
- Check if power is supplied to the circulator. Verify the circuit breaker is on.
- Ensure all wiring connections are secure.
- Confirm the thermostat or zone control is calling for heat.
- No Flow or Reduced Flow:
- Ensure isolation valves are fully open.
- Bleed any trapped air from the system and the circulator housing.
- Check for obstructions in the piping or circulator.
- Verify the cartridge is properly seated and not binding.
- Excessive Noise (Gurgling, Air Sounds):
- This typically indicates air in the system. Re-bleed the system thoroughly.
- Ensure system pressure is adequate.
- Excessive Noise (Grinding, Rattling):
- Disconnect power and inspect the cartridge for proper seating and any foreign objects.
- Ensure the motor assembly is securely fastened to the volute.
- Leaks Around Circulator:
- Turn off power and water supply immediately.
- Check all connections and union nuts for proper tightening.
- Inspect the cartridge O-ring or gasket for damage or improper seating.
If troubleshooting steps do not resolve the issue, contact a qualified HVAC technician.
8. Specifications
| Specification | Detail |
|---|---|
| Part Number | 006-036RP |
| Item Weight | 16 ounces (1 lb) |
| Product Dimensions | 5 x 4 x 7 inches |
| Manufacturer | Taco |
| Application | Heating - Pump Part |
9. Warranty and Support
For specific warranty information regarding the Taco 006-036RP Replacement Cartridge, please refer to the documentation included with your purchase or visit the official Taco Comfort Solutions website. Warranty terms typically cover manufacturing defects for a specified period from the date of purchase.
For technical support, installation assistance, or to locate authorized service providers, please contact Taco Comfort Solutions directly through their official customer service channels. Always provide your product model number (006-036RP) and any relevant purchase details when seeking support.





