Graco 218036 Piston Valve
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$141.00
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The Graco 218036 Piston Valve is an OEM pump valve that stabilizes fluid flow and pressure for reliable spraying and longer pump life.
- Fits: Ultra 333, Ultra 433, Ultra 750, EM 590, GM 3500, LineLazer 3500, Ultra/Ultimate 1000
- Helps maintain smooth pressure & spray pattern
- Durable OEM-grade replacement
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Genuine OEM Part
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Overview & Key Specs
The Graco 218036 Piston Valve is a genuine OEM valve used inside select Graco airless pump assemblies. It regulates flow during the piston stroke for consistent priming, pressure stability, and long service life.
Compatible Machines
This 218036 valve fits the following Graco sprayers/stripers:
- Graco Ultra 333
- Graco Ultra 433
- Graco Ultra 750 (Hi-Boy / Lo-Boy)
- Graco EM 590 Series
- Graco GM 3500
- Graco LineLazer 3500 (select models)
- Graco Ultra / Ultimate 1000 Series
Note: Always confirm your model and pump assembly against your parts manual before ordering.
Why choose the Graco 218036 Piston Valve?
- OEM reliability for proper seating and flow control inside the pump.
- Smoother pressure delivery for a better spray pattern and reduced pulsation.
- Correct metallurgy and finish for wear resistance and sealing performance.
- Direct-fit replacement to minimize downtime during service.
Quick Specifications
| Part Number | 218036 |
|---|---|
| Part Type | Piston Valve (pump internal component) |
| Compatibility | See Compatible Machines list above |
| Fits Category | Professional airless paint sprayers / line stripers (select models) |
| Installation | Service part; install per model-specific Graco parts manual |
Fitment & Identification Tips
- Match the valve by part number (218036) in your official Graco parts breakdown.
- Verify your sprayer’s exact series/sub-model (e.g., Ultra vs. Ultra Plus, Hi-Boy vs. Lo-Boy).
- Inspect mating components (seat, spring, piston) for wear; replace as a set if specified.
- After installation, pressure-test and check for leaks before spraying material.
Maintenance Best Practices
- Keep filters clean and strain coatings to reduce particulate wear on valve surfaces.
- Flush thoroughly after use per Graco instructions to prevent residue buildup.
- Use manufacturer-approved lubricants and compatible solvents only.
Frequently Asked Questions
This listing is for the OEM Graco 218036 Piston Valve. Aftermarket options may differ in tolerances, finish, and service life. For best results, match OEM.
Check your sprayer’s parts manual for part 218036. You can also verify by model names listed under Compatible Machines (Ultra 333/433/750, EM 590 series, GM 3500, LineLazer 3500, Ultra/Ultimate 1000).
It’s good practice to inspect the seat, spring, piston, and packings. Some models recommend replacing associated wear parts together for optimal sealing and performance.
A worn valve can cause pulsation or hard-priming. Replacing with a correct OEM piston valve helps restore steady pressure and reliable priming when all other pump components are in spec.
Depressurize system fully, follow the model-specific Graco service steps, torque to spec, and test with water or compatible solvent before spraying coatings.
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