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Graco 237820 Paint Sprayer Intake Strainer Kit

The Graco 237820 Intake Strainer Kit protects your airless sprayer pump from debris and ensures a smooth, reliable paint flow. Perfect for maintenance and long-term performance.

  • Genuine OEM inlet strainer and rock guard
  • Prevents clogging and pump damage
  • Fits 390 STS, Nova SPX, Pro 301STS, and 390 Duro sprayers
  • Easy to replace and clean for consistent spray results

$13.5

Product has been Discontinued by Manufacturer

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Overview & Compatibility for Graco 237820 Q-Kit Strainer, Intake

Compatible Machines

This OEM inlet screen/rock-guard fits the following legacy/professional Graco airless sprayers:

  • 231353 – 390 STS
  • 820226 – Nova SPX (Old Version)
  • 231344 – Pro 301STS
  • 231553 – 390 Duro

What is it?

The Graco 237820 Q-Kit Strainer, Intake is a genuine OEM inlet strainer (rock-guard) that sits on the pump suction. Its job is to stop debris from entering the pump, protecting valves and packings and helping maintain consistent flow.

  • Prevents clogs and premature pump wear
  • Quick, drop-in replacement on supported models
  • OEM build for proper fit and filtration

Part Details

OEM Part Graco 237820 (Q-Kit Strainer, Intake)
Also Called Inlet Screen / Rock-Guard / Intake Strainer
UPC / GTIN 633955651425
Category Filters & Strainers » Airless Paint Sprayers
Compatibility Family 390 STS / Nova SPX (old version) / Pro 301STS / 390 Duro
What’s Included Inlet strainer (rock-guard) assembly for the models listed above

How to Confirm Fit

  1. Locate your sprayer’s exact model number (e.g., 231353) on the nameplate.
  2. Match it against the Compatible Machines list above.
  3. Check your parts diagram to ensure the inlet assembly matches your current setup.

Frequently Asked Questions

It filters out dried paint, skins, and job-site debris at the pump inlet, protecting internal components and helping maintain smooth, consistent spray performance.

No—237820 is for specific professional/legacy models (see list above). Magnum consumer units typically use different rock-guards and part numbers. Check your Magnum model’s parts list for the correct inlet strainer.

Inspect before each job. Replace when the mesh is torn, crushed, heavily clogged, or after repeated solvent cleanings that weaken the screen. Regular replacement is low-cost insurance against pump damage.

Clean the suction tube and check valve area while the old strainer is off. Seat the new strainer fully and verify there are no air leaks at the inlet that could cause cavitation or pressure fluctuation.

Use your sprayer’s exact model/part diagram to cross-reference. If your unit is not one of the four models above, you likely need a different inlet strainer. Contact support with your model/serial for guidance.

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