246428 Airless Spray Pump for Graco Ultra Max II and LineLazer 3400

In this review the 246428 Airless Spray Pump is evaluated as a direct replacement pump for several Graco Nova, Ultra, and Max II series sprayers and the LineLazer 3400. The bottom line: this pump is for contractors and experienced DIYers who need a durable, corrosion-resistant replacement that restores a stable output around 3300 PSI for consistent coating flow. It performs best when used with compatible models and common coatings like latex and oil-based paints, but users must follow the installation precaution to shake the pump before fitting to avoid early malfunction.

Key Features

• Compatibility: Fits Graco Nova, Ultra, and Max II series including 390, 395, 490, 495, 595 and LineLazer 3400 for straightforward replacement on supported machines.
• Stable output: Delivers a steady 3300 PSI operating output that helps produce smooth, uniform coverage on walls, fences, and furniture.
• Material durability: Built from high quality stainless steel to resist corrosion and wear for longer in typical jobsite conditions.
• Coating versatility: Works with latex, oil-based coatings, stains, and heavier materials so it covers a wide range of painting and staining tasks.
• Easy to install: All necessary parts are included and the pump is designed for a straightforward swap on compatible airless sprayers.
• Installation precaution: A recommended shake before installation prevents internal steel balls from sticking and reduces the chance of early malfunction.

Who It's For

The 246428 pump is aimed at professional painters, rental centers, and experienced homeowners who already own a compatible Graco Nova, Ultra, or Max II series sprayer or a LineLazer 3400 and need a reliable replacement unit. It suits projects that require a steady pressure output for even spraying of walls, decks, fences, and furniture.

It is not for users of the ST Max series or the updated Graco Nano models, and anyone using a non-compatible sprayer should look for a pump specifically listed for their machine. Novice users who are uncomfortable with small mechanical installs should consider professional installation.

Pros & Cons

Pros

• Restores consistent 3300 PSI output for even coating and reliable spray performance.
• Stainless steel construction offers improved corrosion and wear resistance for longer service life.
• Compatible with a wide range of coatings, including latex and oil-based products.
• Designed for easy installation with included parts to simplify replacement.

Cons

• Does not fit ST Max series or updated Graco Nano models, so compatibility must be checked carefully.
• Requires the recommended shake before installation to avoid internal ball sticking, which adds a small extra step.

Specifications

Model fit	Graco Nova, Ultra, Max II 390/395/490/495/595; LineLazer 3400
Not compatible	ST Max 390/395/490/495/595 and updated Nano models
Output pressure	3300 PSI
Material	High quality stainless steel
Coating types	Latex, oil-based, stains, heavy coatings
Installation	All parts included; shake pump before install

Our Verdict

The 246428 Airless Spray Pump is a practical, value-minded replacement for owners of supported Graco Nova, Ultra, and Max II sprayers and the LineLazer 3400 who need to restore steady 3300 PSI performance. Its stainless steel construction and broad coating compatibility make it a durable choice for regular jobsite and homeowner use, provided you confirm model compatibility and follow the installation precaution.

Frequently Asked Questions

Will this pump fit my sprayer model?
It fits Graco Nova, Ultra, Max II 390/395/490/495/595 and LineLazer 3400; it does not fit ST Max series or updated Nano models.

What coatings can I spray with this pump?
It is suitable for latex, oil-based paints, stains, and heavier coatings when used within the sprayer's recommended settings.

Any special installation steps?
Shake the pump several times before installation to prevent internal steel balls from sticking to the alloy plate and causing malfunction.