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Graco 189440 Seal, Piston

OEM piston seal designed for Graco Dura-Flo 1800 lower assemblies, maintaining reliable pressure control and minimizing leakage in high-pressure pump operation.

  • Genuine Graco part number 189440
  • Compatible with Dura-Flo 1800 pump systems
  • Designed for 290 cc lower units
  • Supports consistent sealing and fluid control
  • Precision-fit for reduced wear and stable performance

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Piston Sealing Support & Lower Pump Compatibility

Compatible Machines

Compatible Equipment Series / Type
Graco Dura-Flo 1800 290 cc Lower Units
Lower Part No. 222801 Dura-Flo 1800
Lower Part No. 222802 Dura-Flo 1800
Lower Part No. 222803 Dura-Flo 1800
Lower Part No. 222804 Dura-Flo 1800
Lower Part No. 222805 Dura-Flo 1800
Lower Part No. 222806 Dura-Flo 1800

What Is the Graco 189440 Seal, Piston?

The Graco 189440 Seal, Piston is a genuine OEM sealing component designed for use in Graco Dura-Flo 1800 lower pump assemblies. This precision-engineered seal helps maintain proper fluid pressure and sealing integrity within the piston assembly during pump operation.

Built for demanding industrial fluid handling applications, the piston seal minimizes leakage, supports smooth pump cycling, and contributes to efficient fluid transfer performance in high-pressure systems.

Manufactured to original Graco specifications, the seal ensures dependable compatibility with select 290 cc lower units while helping extend pump service life and maintain operational reliability.

Key Features

  • Genuine Graco OEM piston seal component
  • Designed for Dura-Flo 1800 lower assemblies
  • Supports reliable sealing and pressure consistency
  • Helps reduce fluid leakage and component wear
  • Compatible with multiple 290 cc lower units
  • Precision-manufactured for dependable pump performance

Frequently Asked Questions

The piston seal helps maintain pressure and sealing integrity within the lower pump assembly, supporting efficient fluid transfer and minimizing leakage.

This seal is compatible with select Graco Dura-Flo 1800 lower assemblies, including several 290 cc lower unit configurations.

Yes. The Graco 189440 Seal, Piston is a genuine OEM component manufactured to original Graco specifications for fit and performance.

Replacing a worn piston seal helps restore pressure consistency, reduce leakage, improve pump efficiency, and prevent premature wear on internal components.

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