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Silver metal pump cartridge assembly with bolts visible

Taco Inc

Taco Inc 005-020RP Cartridge Assembly for 005B and 006B-3

SKU CH-N6R5-188A8

A replacement cartridge assembly for Taco 005B and 006B-3 circulating pumps, supplied with mounting bolts

  • TypeLearning Thermostats
  • Drop-in cartridge restores pump performance
  • Fits 005B and 006B-3 circulators directly
  • Includes mounting bolts for quick installation
  • Compatible with multiple 005 and 006 series models
  • Replaces Grainger 3GZW, 4JB21, 4PC87, 4PC88, 4YVF2, 5P431, 5P432

Cartridge Assembly for 005B and 006B-3 Pumps

This cartridge assembly replaces the core mechanism in Taco 005B and 006B-3 circulating pumps. It fits the 005 and 006 series families and matches several manufacturer model numbers including 005-SF2 and 006-B4 variants. Maintenance teams use it to restore pump function without replacing the entire housing.

Bolts Included for Direct Installation

The package supplies the necessary bolts so technicians can complete the swap in one visit. Compatibility with Grainger part numbers such as 3GZW, 4JB21, 4PC87, and 5P431 simplifies cross-referencing during procurement. No separate fastener kit is required.

In-Line Pump Mounting Simplifies Access

Designed for in-line circulating pumps, the cartridge sits within the pipe run for straightforward removal. The bolt-on construction allows the assembly to be exchanged without cutting pipework or draining large system volumes. This reduces downtime during scheduled service or emergency repairs.

Highlights

  • Drop-in cartridge restores pump performance
  • Fits 005B and 006B-3 circulators directly
  • Includes mounting bolts for quick installation
  • Compatible with multiple 005 and 006 series models
  • Replaces Grainger 3GZW, 4JB21, 4PC87, 4PC88, 4YVF2, 5P431, 5P432

Specifications

BrandTACO
TypeLearning Thermostats

Questions about this item

How often will the cartridge in the 005-020RP assembly need replacement under normal operation?

The cartridge is a wear component for in-line circulating pumps; replacement timing depends on water quality and duty cycle rather than a fixed interval.

What is the first performance limit reached when the pump runs continuously at high load?

Sustained high-load operation typically hits the motor's thermal protection before flow or pressure curves become limiting.

How much noise and heat does the cartridge assembly add when the circulator runs all day?

The cartridge itself runs silently inside the volute; audible noise and heat come from the motor housing and are normal for in-line pumps.

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