AL420-40-KIT | 4 GPM 3650 PSI Wet Sandblast Kit Professional

AL420-40-KIT

The AR AL420-40-KIT — 4 GPM 3,650 PSI Wet Sandblast Kit is a heavy-duty, high-flow wet sandblasting
system engineered to convert compatible pressure washers into powerful coating-removal tools. Rated up to
4 GPM at 3,650 PSI, it leverages water’s momentum to accelerate abrasive media at the work surface
while suppressing dust, moderating heat, and cutting down on the secondary cleanup that typically follows dry blasting.

Designed for industrial and commercial users, this kit delivers fast, controlled removal of coatings, corrosion, scale,
and stubborn surface deposits on metal, concrete, stone, and other durable substrates—producing uniform profiles ready
for inspection and recoating.

Venturi Injection & Wet Blasting Process

AL420-40-KIT High-Flow Venturi Draw

At the heart of the AL420-40-KIT is a venturi-style injector that pulls abrasive media through the suction line,
meters it smoothly into the pressurized water stream, and projects a concentrated, high-velocity plume. This venturi
action maintains energy across distance for consistent cutting action and an even surface profile, even at high flow.

Advantages of Water-Assisted Blasting

• Dust suppression: water encapsulates fines to dramatically reduce airborne dust and rebound.
• Controlled surface temperature: helps prevent warping or heat damage on thinner workpieces.
• Cleaner work zone: spent media and debris settle quickly, simplifying containment and disposal.

Performance, Capacity & Construction

High-Flow Rating

• Flow capacity: up to 4 GPM at 3,650 PSI on compatible washers.
• Efficient hydraulic path: minimizes pressure loss so more pump energy reaches the nozzle.
• Balanced metering: promotes fast removal rates with consistent, repeatable results.

Durable Components

• Corrosion-resistant metal body: built to withstand water, abrasive media, and high pressure.
• Reinforced fittings & nozzle: designed to resist wear from combined abrasive and water impact.
• Long suction hose: extended length supports uninterrupted draw from a staged media container.

Media & Application Versatility

Compatible Abrasives

The AL420-40-KIT works effectively with widely used, non-silica abrasive media such as garnet,
crushed glass, and baking soda. Operators can match particle hardness and size to the
substrate and desired finish, from aggressive coating removal to more controlled cleaning.

Typical Uses

• Industrial machinery refurbishment and equipment frame de-scaling.
• Fleet maintenance for trucks, trailers, and heavy mobile equipment.
• Shipyard and marina work on hardware, rails, ramps, and marine growth.
• Bridge, rail, and structural steel preparation prior to recoating.
• Graffiti, sealer, and coating removal from concrete, stone, and masonry.
• General restoration projects where dust control and cleanliness are critical.

Setup & Operation

Quick Connection Steps

• Attach the wet sandblast head firmly to the pressure washer wand or lance.
• Place the suction probe into a suitable abrasive media container positioned safely out of the immediate blast area.
• Pressurize the system—once water flow begins, the venturi automatically draws media into the stream.

Optimizing Performance

• Adjust standoff distance and traverse speed at the wand to tune aggressiveness and surface finish.
• Set machine flow and pressure within the 4 GPM / 3,650 PSI envelope appropriate to the job and media.
• Keep the nozzle aligned squarely to the surface to maintain a coherent plume and minimize abrasive waste.

Maintenance & Best Practices

Post-Job Care

• Flush the nozzle assembly and suction hose with clean water to clear residual abrasive and prevent clogging.
• Inspect the orifice, injector, and fittings for wear; replace worn parts to preserve cutting performance.
• Check threaded connections and hose jackets regularly to keep the system leak-free under pressure.

Media Handling

• Store abrasive in covered containers to prevent moisture ingress and clumping.
• Strain or screen media as needed to remove oversized fragments that could disrupt flow.
• Dispose of spent media and debris according to local regulations and site requirements.

Work Quality & Productivity

Consistent Surface Preparation

In operation, the AL420-40-KIT’s efficient hydraulic path and controlled abrasive delivery produce high removal rates
with fewer passes to bare substrate and more uniform anchor profiles for coatings. Operators spend less time chasing
dust or stray abrasive and more time achieving a clean, repeatable finish ready for rinse-down, inspection, and
recoating steps.

Standardized, High-Flow Platform

The clear 4 GPM / 3,650 PSI rating gives crews an unambiguous compatibility target for high-flow
pressure washer platforms. Simple, durable construction keeps training short, procedures easy to standardize, and
maintenance predictable across rigs and teams.

Keywords: AL420-40-KIT, wet sandblast kit, 4 GPM, 3,650 PSI, venturi abrasive injection, high-flow
blasting, coating removal, corrosion removal, concrete prep, 30 ft suction hose, industrial surface preparation