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Graco 108944 Buna Ball, 715

The Graco 108944 Buna Ball is a critical one-way check ball for Graco diaphragm pumps, ensuring proper fluid flow and reliable sealing. Key highlights include:

  • Genuine OEM part for Husky 515/716/715 series pumps
  • Buna-N material suitable for general-purpose fluids
  • Maintains proper pump performance and prevents backflow
  • Easy replacement when performing pump maintenance

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Overview – 108944 Buna Ball / 715

This genuine OEM part is a Buna-N (nitrile) check ball used inside Graco diaphragm pumps to provide one-way sealing and reliable flow control. It plays a critical role in maintaining pump efficiency and preventing backflow within the fluid section.

Compatible Machines

  • – Uses part 108944 when configured with Buna-N balls.
  • / – Buna-N ball option lists part number 108944.
Part Number 108944
Material Buna-N (Nitrile Rubber)
Ball Diameter Approx. 0.75″ (3/4″)
Application Installed in pump fluid section as part of the ball-check valve assembly
Function Ensures one-way fluid flow and prevents backflow
Important Note Verify pump model, series, and ball material requirement before ordering

Key Features & Benefits

  • ✔ Genuine OEM component for precise fit and dependable performance
  • ✔ Buna-N material suitable for general-purpose fluids and moderate temperatures
  • ✔ Restores proper check valve sealing and pump efficiency
  • ✔ Direct replacement for pumps originally configured with Buna balls

Installation & Service Tips

  • Fully depressurize and disconnect the pump before servicing.
  • Remove the check valve plug and inspect the ball seat and cavity for wear or scoring.
  • Install the new 108944 ball and torque components according to your pump manual.
  • Test the pump at reduced pressure and check for leaks or irregular flow.
  • For abrasive, chemical-intensive, or high-temperature applications, consider PTFE or stainless steel ball options if specified by your equipment manual.

Frequently Asked Questions

The check ball creates a one-way seal inside the pump’s fluid section, allowing forward flow while preventing backflow. This ensures proper priming, consistent pressure, and efficient pump operation.

Check your pump’s model and series (for example Husky 515 or 716/715) and confirm that the parts list specifies ball part number 108944 made from Buna-N.

No. Always use the material specified in your pump’s parts manual. Changing ball material can affect chemical compatibility, durability, and overall pump performance.

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