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Cast iron 12-stage booster cartridge with shaft and o-rings

Flint & Walling

Flint & Walling Booster Cartridge 12 Stages 132939 Cast Iron

SKU CH-6M4H-7E3AH

12-stage cast-iron impeller cartridge for PB-series booster pumps, includes two O-rings, coupling, discharge bearing, shaft and stage components

  • 12-stage cartridge boosts booster-pump pressure
  • Cast-iron construction resists wear in demanding water systems
  • Includes two O-rings, coupling, discharge bearing, shaft and stage parts for complete rebuild
  • Fits Flint & Walling PB-series pumps including model PB0512A051
  • Cross-references Grainger numbers 1P879 and 22W710 for easy identification

Booster Cartridge for PB Series Pumps

This Flint & Walling booster cartridge is built as a direct replacement for PB series booster pumps. It contains a twelve stage impeller assembly housed in cast iron for corrosion resistance. The cartridge fits manufacturer model PB0512A051 and matches Grainger part references 1P879 and 22W710. It is intended for installers and maintenance teams servicing compatible Flint & Walling booster systems.

Thermals Noise and Power Draw

The cartridge is a passive mechanical component with no motor, electronics or moving parts of its own. It generates no heat, produces no noise and draws no electrical power during operation. System thermals, sound levels and energy consumption are determined entirely by the host pump and the application conditions.

Included Components and Installation Impact

The package supplies two O-rings, a coupling, a discharge bearing, a shaft and all stage components required for a complete cartridge swap. These parts allow the technician to refresh the hydraulic end without sourcing separate seals or hardware. Replacing the cartridge restores the pump's original stage count and pressure capability when wear has reduced performance.

Highlights

  • 12-stage cartridge boosts booster-pump pressure
  • Cast-iron construction resists wear in demanding water systems
  • Includes two O-rings, coupling, discharge bearing, shaft and stage parts for complete rebuild
  • Fits Flint & Walling PB-series pumps including model PB0512A051
  • Cross-references Grainger numbers 1P879 and 22W710 for easy identification

Specifications

BrandFLINT & WALLING

Questions about this item

How do I install the 12-stage cartridge into my PB series booster pump, and what step is often missed?

Slide the cartridge into the pump housing, fit the two included O-rings into their grooves, then secure the coupling onto the shaft — forgetting either O-ring is the common mistake that causes leaks.

Which parts of the 132939 cartridge will need replacement during routine maintenance?

The two supplied O-rings, the discharge bearing, and the coupling are wear items; the 12 impeller stages and shaft typically last the life of the pump unless debris causes damage.

What is the first performance limit reached when the booster runs continuously at high demand?

The discharge bearing on the 12-stage cartridge generates the most heat under sustained flow, so bearing temperature becomes the limiting factor before the impeller stages lose efficiency.

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