Quick Overview
Graco 100400 – Ball, Metallic
A genuine Graco metallic check ball used inside specific pump/check-valve assemblies. Selecting the correct ball is essential for proper sealing, prime/hold-pressure, and overall pump performance.
Compatible Machines / Pump Series
- Mini Fire-Ball 225 (3:1) lubrication/fluids pump series
- Fire-Ball 15:1 lubrication/fluids pump series
What this part does
The 100400 Ball (Metallic) acts as a precision check ball in the pump’s fluid section. When properly seated, it helps prevent backflow, maintains prime, and supports consistent output and pressure stability.
Key Specifications
| Part Number | 100400 |
| Description | Ball, Metallic (check-valve ball for select Graco pumps) |
| Typical Use | Check-valve function in fluid section to control flow and hold pressure |
| Material | Metallic (steel) |
When to replace
- Loss of prime or pressure “bleed-down” at rest
- Pulsation/spitting caused by poor ball seating
- Visible wear, pitting, or flat-spotting on the ball
Benefits of using the correct OEM ball
- Reliable sealing for smoother operation and consistent output
- Improved durability versus generic substitutes
- Correct fit in Graco-specified seats and cages
Frequently Asked Questions
This 100400 Ball, Metallic is confirmed for specific Graco Fire-Ball pump families (listed above). For any paint sprayer or texture machine, confirm by checking that model’s parts manual—look for part number 100400 in the check-valve/ball listing before purchase.
Common signs include difficulty priming, pressure loss at rest, pulsation, or inconsistent flow. Inspect the ball for flat spots, pitting, or contamination preventing full seating.
It’s good practice to inspect the mating seat/cage. A damaged seat may prevent proper sealing even with a new ball. Replace associated components if wear or scoring is present.
Keep components clean, verify orientation per the service manual, and torque hardware to spec. Avoid abrasives; debris can cause premature wear or prevent proper seating.
Yes—100400 refers to the OEM Graco part number for the Ball, Metallic. Using genuine parts helps preserve performance and warranty compliance.
