Graco 235004 Inlet Strainer 3/4

The Graco 235004 Inlet Strainer (3/4") helps protect your sprayer’s pump by filtering out debris before paint enters the system — extending pump life and ensuring smooth performance.

Thread Size: 3/4" UNF (male)
Type: Inlet Strainer / Rock Guard
Purpose: Prevents clogs and pump damage
Material: Stainless steel mesh with durable nylon cap
Fits: ST, STX, Ultra, Ultra Max, 190ES, 210ES & other Graco sprayers

$22.3

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Description

Essential Protection for Graco Pumps — 235004 Inlet Strainer (3/4")

Compatible Machines

Graco ST Series (e.g., 295 ST, 395 ST, 495 ST)
Graco STX Series
455 / 495 ST Lo-Boy
Ultra 600 Lo-Boy
Ultra Max 695 / 795 Lo-Boy
GM3000 Lo-Boy
390 / 395 / 450 / 455 / 490 / 495 ST Stand models
190 ES (Stand)
210 ES Hi-Boy

What is the Graco 235004 Inlet Strainer 3/4"?

The Graco 235004 Inlet Strainer (3/4")—also called a rock guard—is a pump-side screen that filters out debris before it enters the sprayer. By stopping contaminants at the inlet, it helps prevent premature pump wear, reduces tip clogs, and keeps your finish consistent on the job.

Key Benefits

Pump protection: Screens out chunks/contaminants before they reach the fluid section.
Fewer clogs: Helps maintain steady flow and spray pattern quality.
Service friendly: Simple to remove, rinse, and reinstall between jobs.
OEM fit: Made for Graco paint sprayers that accept a 3/4" inlet strainer.

Specifications

Part Number	Graco 235004
Type	Inlet strainer / rock guard
Thread Size	3/4" UNF (male, screws into sprayer inlet)
Screen Material	Stainless-steel mesh (standard)
Cap / Body	Durable polymer/nylon cap design
Primary Function	Pre-filters paint to protect pump & reduce clogs

Fit & Usage Tips

Verify your sprayer’s inlet thread is 3/4" UNF to ensure proper fit.
Rinse the screen regularly—especially when switching materials or after long breaks.
Replace the screen if damaged, deformed, or persistently clogged.

Frequently Asked Questions

It fits many Graco models that use a 3/4" UNF inlet strainer, including the machines listed above (ST/STX, Ultra/Ultra Max Lo-Boy variants, ES series, etc.). If you’re unsure, match your inlet thread size or check your sprayer manual for “inlet strainer 3/4" UNF” compatibility.

It blocks debris before it reaches the pump, helping to minimize tip clogs, maintain consistent spray, and extend the life of your sprayer’s fluid section.

Inspect and rinse after each job or material change. Replace if the mesh is torn, crushed, or if persistent flow restriction continues after cleaning.

The strainer uses a stainless-steel mesh suited for typical architectural coatings. If you require a particular mesh rating for specialty materials, check your sprayer manual or contact support with your application details.

Confirm a snug fit on the 3/4" UNF inlet, avoid overtightening, and always start with clean paint and a clean bucket. Rinse the strainer thoroughly after use to prevent dried material from restricting flow.