Graco 305264 By-Pass Valve

Compatible Machines

• Graco 390 Airless Sprayer
• Graco 395 Airless Sprayer
• Graco 490 Airless Sprayer
• Graco 495 Airless Sprayer
• Graco 595 Airless Sprayer

Product Overview

The Graco 305264 By‑Pass Valve is an OEM replacement part designed for use in Graco airless paint sprayers as a pressure control and recirculation component. The bypass valve allows paint or coating material to be diverted back into the system when the spray gun is closed or during pump priming, helping maintain the correct internal pressure and protecting the pump assembly.

Key Features

• Genuine Graco replacement part for reliable performance.
• Helps regulate fluid pressure and recirculation in airless system.
• Compatible with a range of Graco professional airless sprayers.

Installation & Function

This by‑pass valve installs in the fluid path of the sprayer’s pump assembly and works by redirecting fluid back into the pump when needed, rather than allowing full pressure to build while the spray gun is closed. This protects the pump from over‑pressure and reduces wear during priming or relief conditions.

Frequently Asked Questions

Tips for Use

• Always verify part number against your machine’s manual before installation.
• Ensure sprayer is depressurized before servicing or replacing internal components.
• If unsure of compatibility, consult a Graco parts dealer with your model number.