Graco 124249 Ceramic Ball - Si-N

The Graco 124249 Ceramic Ball – Si-N is a durable OEM check-valve component made from silicon nitride for long life and reliable sealing performance. It’s essential for maintaining pump pressure and proper fluid flow.

Material: Silicon Nitride (Si₃N₄) Ceramic
Function: Controls one-way fluid flow, prevents backflow
Fits: Magnum X5, X7, ProPlus A30/A45, Tradeworks 150/170, Ultra Max II, GMax, Mark series
OEM Quality: Genuine Graco replacement part

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Description

Precision Ceramic Check Ball (Si-N) for Graco Pumps

Compatible Machines

This Graco 124249 Ceramic Ball – Si-N is used in check-valve assemblies across several popular Graco sprayers. Always confirm against your unit’s parts diagram.

Graco Magnum X7 Airless Paint Sprayer
Graco Magnum X5 Airless Paint Sprayer
Graco ProPlus A30
Graco ProPlus A45
Graco Tradeworks 150
Graco Tradeworks 170
Graco Ultra Max II series (select models)
Graco GMax series (select models)
Graco Mark series (select models)
Graco 1595 (select pumps/models)

Tip: Model-to-model valve configurations can vary. If your model isn’t listed, check the pump’s inlet/outlet valve diagram for “124249”.

About Graco 124249 Ceramic Ball – Si-N

The 124249 is a silicon-nitride (Si-N) ceramic check ball used in Graco airless sprayer valve assemblies to ensure one-way fluid flow and reliable sealing under pressure. Its ultra-hard ceramic construction offers excellent wear and chemical resistance for longer service life in demanding coatings.

Role: Check-valve ball (helps maintain prime and pressure; prevents backflow)
Material: Silicon Nitride (Si₃N₄) high-performance ceramic
Use Case: Commonly found in inlet/outlet valve stacks on select Graco pumps
Quality: Genuine Graco OEM replacement part

Key Specifications

Part Number	124249
Part Name	Ceramic Ball – Si-N (check-valve ball)
Material	Silicon Nitride (Si₃N₄) ceramic
Fits	Selected Magnum, Ultra Max II, GMax, Mark & related pumps (see list above)
Category	Valve components » Check-valve internals
OEM	Graco Original

Note: Exact dimensions may vary by valve stack; match by part number and sprayer model diagram.

When to Replace the 124249 Ball

Sprayer won’t hold prime or loses pressure intermittently
Fluid leaks back through valve or “spongy” trigger feel
Visible damage/chips on the ball or pitted seat contact

What’s Included & Compatibility Tips

Included: One (1) Graco 124249 Ceramic Ball – Si-N
Not Included: Seats, springs, retainers, or seals (order per your valve kit)
Verify: Cross-check your exact sprayer model’s parts list/diagram for “124249” before purchase

Frequently Asked Questions

Check your model’s pump/valve diagram and look for part 124249. If listed in the inlet/outlet valve stack, this is the correct replacement. Serial-year variants may differ, so use the exact model and type number from your unit’s data plate.

Silicon-nitride ceramic is extremely hard and wear-resistant, maintaining a precise seal face for longer life, especially with abrasive or solvent-borne coatings. It also resists corrosion. Use the material specified by your pump to maintain designed sealing performance.

No. This listing is for the 124249 ball only. Order the matching valve seat, spring, and any seals or retainers as specified in your sprayer’s valve kit/diagram.

It is used within the pump’s check-valve assembly (inlet and/or outlet, depending on model). The ball seals against a seat to control one-way fluid movement during pump cycles.

Difficulty priming, pressure drop, pulsation, or backflow are common indicators. Inspect for chips/flat spots. Replace the seat at the same time if wear is present to ensure a perfect seal.