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Alpha Wet Sanding/Polishing Kit
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At a Glance
Quick Decision Guide
Application
Wet edge treatments
Kit Size
4"
Maximum Speed
6,000 RPM
Tool Fit
Makita or Alpha 800 Series
Water Control
Adjustable valve
Splash Control
4" guard
GFCI
120V included
Power Tool
Not included
Why Choose This Product
Key Benefits
Wet Tool Conversion
Adds water-fed sanding and polishing capability to a compatible grinder or polisher.
Water-Fed Dust Control
Keeps the working surface wet to help control airborne dust.
Edge Treatment Focus
Creates a practical setup for wet sanding and polishing edge details.
Adjustable Water Flow
Included valve and connectors provide control over water delivery.
Splash Management
A 4" guard helps contain water around the working attachment.
Electrical Protection
Included 120V GFCI provides ground-fault protection during wet operation.
Product Information
Product Details
About This Product
Convert a Compatible Grinder for Wet Edge Work
Alpha Wet Sanding/Polishing Kit converts a compatible variable-speed angle grinder or polisher into a water-fed 4" system for sanding and polishing edge treatments. It provides wet-working capability for select Makita grinders and Alpha 800 Series polishers without requiring a separate dedicated wet tool.
Controlled Water Delivery and Splash Management
The included control valve, hose, connectors, and shut-off valve supply adjustable water to the working area. Keeping the surface wet helps control airborne dust during sanding and polishing, while the 4" dust and splash guard helps contain water around the attachment.
Complete Conversion Hardware for Professional Use
The kit includes the collars, spacer, inner flange, lock nut, hose bands, pin wrench, and other hardware needed to create the wet configuration. A 120V GFCI provides electrical protection, while the included memory wrap helps keep the water hose organized alongside the tool setup.
Specifications
Brand
Alpha Professional Tools
Part Number
SPW4KIT
UPC
749173462382
Product Type
Wet sanding and polishing conversion kit
Kit Size
4"
Maximum Speed
6,000 RPM
Recommended Application
Edge treatments
Compatible Tools
Makita grinder or Alpha 800 Series polisher
Compatible Grinder Sizes
4-1/2", 5", and 6"
Operating Method
Water-fed sanding and polishing
Guard
4" dust and splash guard
Water Control Valve
R1/8" with 8 mm ID
Water Hose
For 8 mm OD connection
Quick Connector
Shut-off valve included
GFCI
120V
Memory Wrap
3 ft, 18 mm
Mounting Hardware
Collars, spacer, flange, lock nut, and hose bands
Tool
Not included
Abrasive Discs
Not included
Common Questions
Frequently Asked Questions
What does the Alpha Wet Sanding/Polishing Kit do?
The kit converts a compatible variable-speed angle grinder or polisher into a water-fed 4" sanding and polishing system. It is designed for edge treatments and combines water-control components, a splash guard, mounting hardware, and electrical protection in one coordinated conversion package.
Which grinders and polishers are compatible with the kit?
Alpha lists the SPW4KIT for use with a Makita grinder or an Alpha 800 Series polisher. The manufacturer also identifies popular 4-1/2", 5", and 6" variable-speed angle grinders as potential applications. Verify that the collars and mounting components fit the exact tool model before use.
What components are included with the wet kit?
The kit includes a 4" dust and splash guard, adjustable water-control components, hose connectors, stainless steel bands, plastic and stainless steel collars, a spacer, inner flange, lock nut, 120V GFCI, pin wrench, and memory wrap. One of each listed component is supplied.
Does the kit include a grinder, backer pad, or polishing discs?
No power tool, backer pad, or abrasive discs are listed among the included components. The kit supplies the guard, water-delivery system, mounting hardware, GFCI, and related conversion accessories. Compatible sanding or polishing discs and the appropriate grinder or polisher must be selected separately.
What is the maximum operating speed?
The 4" wet sanding and polishing kit has a maximum operating speed of 6,000 RPM. The connected variable-speed grinder or polisher must be operated within this limit. Always follow the speed ratings and operating requirements for the power tool, backer pad, and abrasive being used.
How does the kit control water and dust?
The water hose, control valve, valve connector, push-in connector, and quick connector deliver adjustable water to the working area. Keeping the surface wet helps control airborne dust during sanding and polishing. The included 4" guard also helps manage water around the attachment.
Does the kit include GFCI protection?
Yes. The SPW4KIT includes a 120V ground-fault circuit interrupter for electrical protection during wet operation. The GFCI does not replace proper setup or safe work practices, so the kit and connected power tool must still be used according to Alpha's instructions.
Are the wet and dry sanding kits sold together?
No. Alpha sells the wet and dry systems separately. SPW4KIT is the water-fed version for wet sanding and polishing, while SPD4KIT is the dry version designed for connection to a vacuum. Select the system that matches the intended working method and dust-control setup.