The GRACO 18C889 Check Flap Valve is a replacement part designed for use in GRACO PowerFill 3.5 Standard, Pro, and XL Pro series sprayers. It acts as a one-way valve to ensure proper fluid flow direction and prevent backflow within the system. The material is not specified in available sources.

Key Features:

• Check Flap Valve
• 18C889
• GRACO PowerFill 3.5 Standard, Pro, and XL Pro series sprayers
• Essential for maintaining proper system function
• Prevents backflow in fluid handling systems
• Replacement part for multiple GRACO sprayer models

Applications:
Used in GRACO PowerFill 3.5 Standard, Pro, and XL Pro series sprayers for fluid handling and spray applications.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with your equipment.
• Always replace both check flap valves if required, as most models use two valves.
• Refer to the equipment manual for specific installation instructions and torque specifications (e.g., 3 in-lbs or 0.34 N•m for related components).
• Ensure the system is depressurized before installation.