AIR-680UW Underwater Pneumatic Polisher

AIR-680UW Underwater Pneumatic Polisher — Purpose-Built for Submerged Pool Surface Finishing

The Alpha® AIR-680UW is a pneumatic polisher engineered specifically for underwater polishing and grinding applications. It is a modified version of the best-selling AIR-680, redesigned with a 27 ft (8.1 m) flexible vacuum hose to enable underwater polishing on most pool sizes. The tool is intended for pool contractors and trades professionals who require a reliable, submersible polishing solution. When the vacuum hose is not required, the AIR-680UW can also be used without it for standard wet polishing operations.

Technical Specifications

Equipment Included

Unlike standard wet polishers that are limited to above-water or surface-level wet work, the AIR-680UW is purpose-built for fully submerged operation, with a 27 ft vacuum hose that accommodates most pool sizes. The tool's dual-mode capability — underwater with the vacuum hose or conventional wet polishing without it — gives pool contractors a single tool that covers a broader range of finishing tasks compared to single-purpose alternatives.

Key Features & Benefits

Underwater-Rated Design

The AIR-680UW is specifically engineered for submerged use, making it suitable for polishing and grinding pool surfaces without draining the pool. This capability can significantly reduce project downtime for pool renovation and resurfacing work.

27 ft Flexible Vacuum Hose

The included 27 ft (8.1 m) flexible vacuum hose is the key modification that distinguishes the AIR-680UW from the standard AIR-680, enabling underwater polishing on most pool sizes. The extended reach allows the operator to work from the pool deck or edge without entering the water.

Dual-Mode Operation

When the vacuum hose is not attached, the AIR-680UW functions as a standard wet polisher, giving contractors flexibility across different job types. This dual-mode capability means one tool can serve both underwater pool work and conventional wet polishing applications.

Reversible Side Handle and C-Handle

The tool ships with both a reversible side handle and a C-handle, allowing the operator to configure the grip for the demands of the specific task. Proper handle use is emphasized in the manual for control and safety during operation.

Comprehensive Out-of-Box Kit

The AIR-680UW includes all hoses, handles, wrenches, a screwdriver, rust inhibitor oil, a rotary backer pad, and two PlasterKing polishing pads (#50 and #100 grit), so contractors can begin work immediately without sourcing additional accessories. The water quick connector with shut-off valve and the exhaust hose with clamp are also included for a complete setup.

Lightweight at 2.64 lbs

At 2.64 lbs (1.2 kg), the AIR-680UW is manageable for extended polishing sessions, reducing operator fatigue during pool surface finishing work. The pneumatic design eliminates the electrical hazards associated with electric polishers in wet or submerged environments.

Common Applications

Underwater Pool Surface Polishing

The primary application for the AIR-680UW is polishing plaster, pebble, and other pool surface finishes while the pool remains filled. The 27 ft vacuum hose allows the operator to reach most pool surfaces from the deck.

Underwater Pool Surface Grinding

In addition to polishing, the tool is rated for grinding underwater, making it suitable for removing surface irregularities, rough spots, or calcium deposits on submerged pool surfaces.

Wet Polishing (Above Water)

Without the vacuum hose attached, the AIR-680UW operates as a conventional wet polisher for surface finishing work on stone, tile, or other materials in standard wet conditions.

Compatible Materials

• Pool plaster surfaces
• Pebble and aggregate pool finishes
• Stone and masonry (wet polishing mode)
• Materials compatible with diamond grinding wheels rated for wet usage

Product Documents

• AIR-680UW Instruction Manual (v0221)
• AIR-680UW Instruction Manual (v1121)
• AIR-680UW Using Underwater Reference Guide
• AIR-680UW Normal Usage Reference Guide
• Air Tool Maintenance Card
• AIR-680UW Parts Schematic (v0225)
• AIR-680UW Product Flyer
• PlasterKing Pads and Backer Pads Flyer
• New From Alpha 2026 Hardscape Flyer

Safety Data Summary

Hazard Information

• Dust generated during polishing, grinding, sanding, sawing, and drilling may contain chemicals known to cause cancer, birth defects, or other reproductive harm (California Prop 65 warning).
• Hazardous dust sources include lead from lead-based paints, crystalline silica from bricks, cement, and masonry products, and arsenic and chromium from chemically-treated lumber.
• Incorrect handling of the polisher may result in death or serious personal injury.

Personal Protective Equipment

• Eye protection conforming to ANSI/ISEA Z87.1 (CAN/CSA Z94.3) required for all users and bystanders.
• Ear protection conforming to ANSI S12.6 (S3.19) required for all users and bystanders.
• NIOSH/OSHA approved respiratory protection appropriate for dust exposure required for all users and bystanders.
• Rubber gloves and insulated non-skid footwear recommended.
• Protective covering for long hair required.
• Do not wear loose clothing or jewelry during operation.

Safe Handling

• Always disconnect the tool from the air supply before servicing or changing accessories such as grinding wheels or backer pads.
• Do not carry the tool by the water supply hose or expose the hose to traffic areas where it can be crushed.
• Only use diamond grinding wheels rated for wet usage; do not use conventional abrasive grinding wheels.
• Do not carry a connected tool or make adjustments without first disconnecting from the air supply to avoid accidental starting.
• Use only recommended accessories; use of non-listed accessories may be hazardous.
• Keep hands away from all moving parts at all times.
• Use the supplied side handles for control and safety during operation.
• Do not operate the tool when fatigued or under the influence of drugs, alcohol, or medication.
• Work in a well-ventilated area and use approved safety equipment to reduce dust exposure.

Frequently Asked Questions

Q: Can the AIR-680UW be used without the vacuum hose?
A: Yes. The tool can be used without the vacuum hose for standard wet polishing applications above water.

Q: What size pools can the AIR-680UW accommodate for underwater polishing?
A: The 27 ft (8.1 m) flexible vacuum hose is designed to allow underwater polishing on most pool sizes.

Q: What spindle size does the AIR-680UW use?
A: The AIR-680UW uses a standard 5/8"-11 spindle, compatible with the included 7" rotary backer pad (MP758HL) and PlasterKing pads.

Q: What type of grinding wheels should be used with this tool?
A: Only diamond grinding wheels rated for wet usage should be used. Conventional abrasive grinding wheels must not be used with this tool.

Q: What air supply requirements does the AIR-680UW need?
A: The tool requires 85 PSI (6 Bar) air pressure and consumes 15 CFM (425 L/min). The air inlet is 1/4" BSPP.

Q: Is rust inhibitor oil included, and can it be replaced?
A: Yes, a 6 oz (200 ml) bottle of rust inhibitor oil is included. The manual notes it can be replaced with AIR-008.