WK-428 Tube Expander

The WK-428 Tube Expander is a professional hand tool built for accurate and controlled expansion of copper tubing in HVAC and refrigeration applications. It allows technicians to expand the ends of copper tubes so pipes can be joined directly without additional fittings, reducing joints and potential leak points.

Engineered for smooth and uniform expansion, the WK-428 maintains the integrity of the tubing while producing consistent results. Its durable construction ensures reliable performance during installation, maintenance, and repair work. With a working range from 3/16″ to 1-1/8″ (4–28 mm), it is suitable for a wide variety of copper tubing commonly used in refrigeration and air conditioning systems.

Key Benefits

Allows direct copper tube connections without couplings
Produces smooth and uniform tube expansions
Reduces leak points in refrigeration and HVAC systems
Wide size range supports multiple applications
Durable construction for professional service use

Specifications

Product Type: Tube Expander
Model: WK-428
Application: Refrigeration and HVAC copper tubing
Supported Tube Sizes: 3/16″ to 1-1/8″
Metric Range: 4 to 28 mm
Material Compatibility: Copper tubes

Applications

Refrigeration system installations
Air conditioning piping work
Copper tube expansion for HVAC systems
Maintenance and repair service operations
Workshop and on-site professional use

FAQs

What tube sizes does the WK-428 support
It supports copper tubing from 3/16″ to 1-1/8″ and metric sizes from 4 mm to 28 mm

Is the WK-428 suitable for HVAC and refrigeration systems
Yes, it is designed specifically for HVAC and refrigeration copper tubing applications

Does this tool reduce the need for fittings
Yes, it allows direct tube-to-tube connections without additional couplings

Is the WK-428 easy to operate
Yes, it is designed for controlled manual operation with consistent results

Can it be used for professional service work
Yes, it is suitable for regular professional installation and maintenance use