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Graco 221077 Pressure Dump Valve

The Graco 221077 Pressure Dump Valve safely releases trapped pressure and allows smooth switching between spray and prime modes for reliable sprayer performance.

  • OEM Graco replacement part
  • Essential for safe pressure relief
  • Improves priming and flushing
  • Fits select Graco airless sprayers

Retail Price: $195
You save: $20.28 (10.40%)
Our Price: $174.72
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Reliable Pressure Control for Airless Sprayers

The Graco 221077 Pressure Dump Valve is a genuine OEM replacement valve designed to safely relieve fluid pressure in compatible Graco airless paint sprayers. This valve plays a critical role in switching between spray and prime modes, flushing the system, and protecting internal pump components from dangerous pressure build-up.

Compatible Machines

  • Graco EM 490
  • Graco Ultra Plus 1500
  • Graco GM 3500

Product Overview

Part Number 221077
Product Type Pressure Dump / Prime Valve
Function Safely relieves system pressure and allows priming & flushing
Brand Graco
OEM Yes
Application Airless paint sprayers & high-pressure fluid systems

Key Benefits

  • Provides safe and controlled pressure relief during operation.
  • Essential for proper priming and system flushing.
  • Helps prevent pump damage caused by trapped pressure.
  • Direct OEM replacement for reliable fit and performance.
  • Improves overall safety during maintenance and shutdown.

Installation Notes

This valve is mounted directly into the pump fluid section. Always ensure the sprayer is fully powered off and pressure is released before replacing the valve. Use proper thread sealing where required and follow the machine service manual for correct torque specifications.

Frequently Asked Questions

It allows trapped fluid pressure to be safely released from the pump and hose, making the sprayer safe to clean, service, or shut down.

Common symptoms include paint leaking from the valve, difficulty priming, pressure not releasing properly, or inconsistent spray pressure.

Professional installation is recommended for best results, but experienced technicians can replace it by following the correct service procedure.

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