AL420-KIT-V | 4 GPM 3650 PSI Wet Sandblast Kit AL420 Line

Overview

AL420-KIT-V Wet Sandblast Kit is a professional, high-flow surface preparation system that turns a compatible pressure washer into a powerful, dust-suppressing abrasive cleaner for fast removal of paint, rust, scale, coatings, and heavy grime on metal, concrete, masonry, and durable composites. Tuned for approximately 4 GPM at up to 3,650 PSI, the kit uses a venturi-style head to draw abrasive media through a pickup line and blend it directly into the pressurized water stream, producing a tight, energetic plume that delivers uniform cutting while the surrounding water curtain cools the workpiece and greatly reduces airborne dust.

This controlled wet process improves visibility, shortens cleanup, and helps protect thin panels and intricate parts from heat and rebound that can accompany aggressive dry blasting, making the kit well suited for equipment restoration, facility maintenance, marine service, fleet work, and construction site surface prep.

Performance & Flow Dynamics

High-Flow Wet Blasting Envelope

Operating within its 4 GPM / 3,650 PSI envelope, the AL420-KIT-V maintains a balanced venturi that resists surging, protecting pump performance while delivering the impact needed for tough coatings and scale on frames, decks, tanks, and structural steel. The tight, energetic plume provides uniform cutting across wide passes and around complex contours, while the water curtain moderates heat and cushions impact on sensitive substrates.

AL420-KIT-V Adjustable Removal Rate & Surface Profile

Operators can tailor removal rate and finished profile by adjusting standoff distance, travel speed, and media grade—choosing coarser abrasives and closer work for rapid coating removal or lighter media and longer standoff for refined finishes on sensitive surfaces. Best practice is to maintain a steady cadence and overlap passes by a small margin to produce even results and predictable prep times across large slabs and panels.

AL420-KIT-V Construction & Durability

Built with corrosion-resistant components and wear-conscious flow paths, the AL420-KIT-V maintains suction stability and hydraulic efficiency during extended shifts, metering media steadily so the blast remains consistent. The compact blast head reaches brackets, weldments, fastener recesses, railings, and cast features where grinders or wide fan tips struggle, and the long pickup hose allows media containers to be staged conveniently for uninterrupted draw.

Surface Results & Applications

Metal, Concrete & Masonry

On steel and aluminum, the stream shears oxide layers and aged coatings quickly without concentrating heat at a single point, which helps minimize warping near seams and formed edges. On concrete and masonry, it lifts paint, graffiti, sealers, and weathered films and rinses residue toward the work area floor rather than distributing dust across adjacent zones.

AL420-KIT-V Typical Use Cases

• Equipment and machinery restoration in plants and workshops.
• Facility and structural maintenance on frames, decks, tanks, and railings.
• Marine service on hardware, hull areas, and dock structures.
• Fleet and construction surface prep on trucks, trailers, and site equipment.

Setup & Operating Tips

Setup is straightforward: attach the blast head to the pressure washer wand, place the suction probe into a container of suitable non-silica abrasives such as garnet, crushed glass, or baking soda, confirm clean, dry media, and begin with a brief test on an inconspicuous spot to dial in flow and technique before working in overlapping passes.

When paired with a washer operating within the stated flow and pressure range, the system maintains venturi balance that resists surging, delivers consistent suction, and protects the pump while providing the impact needed for demanding coating and scale removal tasks.

Housekeeping, Maintenance & Media Care

Cleaner Work Environment

Because water captures fines at the point of impact, end-of-job housekeeping is simpler: spent media and debris tend to settle near the work zone, containment demands are reduced, and turnarounds between stripping and recoating steps are faster.

Routine Service

Routine care keeps performance consistent. At the end of each session, flush the head and pickup line thoroughly with clean water to purge residual grit, inspect the nozzle orifice and venturi throat for wear, check seals, clamps, and threads for tight, leak-free connections, and coil the suction hose loosely in a dry location to preserve flexibility. Replace worn orifices promptly to maintain suction balance and even metering, and keep media stored sealed and dry so intake remains smooth.

Integration & Value

AL420-KIT-V integrates easily with professional pressure washers that use common quick-connect or threaded interfaces, offering a portable alternative to dedicated blast pots and compressors while delivering the controllable profile and cleaner work environment demanded by modern surface prep standards. Durable, efficient, and easy to operate, it provides repeatable, professional results on everything from corroded machinery and fleet components to exterior concrete and marine hardware—finishing surfaces clean and ready for primer, coating, or protective treatment with less dust, less heat, and less rework.