Graco 237840 Q Kit, Strainer

The Graco 237840 Q Kit, Strainer keeps debris out of your sprayer’s pump for smoother, longer-lasting performance. Ideal for gas and hydraulic airless rigs.

OEM Quality: Genuine Graco stainless steel inlet strainer.
Protects Pump: Filters particles before entering the system.
Fits Models: GH 733, GH 833, GH 933, HydraMax 300/350, GMAX 10000.
Durable Build: SST cap handles heavy coatings and demanding jobs.

Retail Price: $43.1

You save: $18.1 (42.00%)

Our Price: $25

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Description

Inlet Strainer Assembly — Protect Your Pump from Debris

Upgrade/replace the inlet screen on heavy-duty Graco rigs with the genuine Graco 237840 Q Kit, Strainer to keep contaminants out of the pump and maintain consistent spray performance.

Compatible Machines

Fits select gas/hydraulic airless rigs below. Always confirm inlet size/thread before ordering.

Graco GH 733 (incl. GH 733 ES)
Graco GH 833
Graco GH 933 (incl. GH 933 ES / Big Rig variants)
Graco HydraMax 300
Graco HydraMax 350
Graco GM / GMAX 10000

Key Details

OEM Part	Graco 237840 Q Kit, Strainer
Function	Inlet Strainer — stops debris before the pump to protect valves, packings, and pistons.
Thread / Size	NPT inlet (large-frame rig fitment; verify your exact inlet size before purchase)
Construction	SST cap (stainless), heavy-duty screen assembly for harsh coatings.
Use Case	Industrial / high-output gas & hydraulic airless sprayers handling protective coatings, primers, heavy paints.

Why Choose the Graco 237840 Strainer

Protects your pump by capturing solids at the inlet.
Helps maintain consistent spray pattern and reduces tip/pump clogs.
Durable stainless cap construction for demanding jobsites.
OEM fit for the models listed above; easy service and routine cleaning.

Installation & Care Tips

Confirm the inlet thread and orientation before tightening; use appropriate thread sealant where specified by Graco.
Inspect and clean the screen regularly; a clogged strainer can starve the pump and cause cavitation.
After abrasive or high-solids materials, flush and recheck mesh integrity.
Replace worn or damaged screens immediately to preserve pump life.

Frequently Asked Questions

Possibly. This is a large-frame inlet strainer used on select gas/hydraulic rigs. Check your unit’s parts manual for the inlet strainer part number and NPT size. If your manual lists 237840 (or shows the same inlet strainer spec), you’re good to go.

Inspect the screen daily in heavy use or when spraying high-solids materials. Clean whenever flow drops, pump surges, or the spray pattern tails. Keeping the screen clear extends pump and tip life.

Follow your sprayer’s manual. Many NPT connections use thread sealant or PTFE tape, but always apply per Graco guidance to avoid introducing leaks or air into the suction side.

Pulsing, cavitation sounds, weak or inconsistent pattern, and frequent tip clogs often point to a restricted or damaged strainer. Clean or replace as needed.

Yes—the kit features an SST (stainless steel) cap. It’s designed for demanding applications; still, always flush and maintain per material supplier and Graco recommendations.