Schaefer Brush 43393 Spiral Tube Brush 11 in 1/4 Male Npt

Product Description

The SCHAEFER BRUSH 43393 is a double stem spiral tube brush designed for cleaning the interior of tubes, pipes, and similar cylindrical passages. It features a 11-inch brush diameter and a 7.5-inch overall length, with a 4.5-inch brush and scraper length. The bristles are constructed from tempered steel wire, providing the stiffness needed to break up scale, debris, and fouling from metal tube walls. Connection is via a 1/4-inch male NPT fitting, allowing it to thread directly onto extension rods or standard cleaning equipment. Plumbers, HVAC technicians, and industrial maintenance personnel are the primary installers of this tool.

This tube brush is suited for use in residential and commercial maintenance applications where tube or pipe interior cleaning is required. Typical scenarios include boiler tube cleaning, condenser tube maintenance, heat exchanger service, and drain or vent pipe clearing. The 11-inch brush diameter makes it appropriate for larger-bore tubes found in commercial HVAC and plumbing systems. The 1/4-inch male NPT connection is compatible with a wide range of standard brush extension handles and rotary cleaning equipment.

Key Features

• 11-inch brush diameter for coverage in larger-bore tubes and pipes
• Tempered steel wire construction for aggressive cleaning of scale and fouling
• Double stem spiral design maintains brush shape under repeated use
• 1/4-inch male NPT connection threads onto standard extension rods and rotary drives
• 4.5-inch brush length provides effective scrubbing contact area
• 7.5-inch overall length allows reach into confined tube assemblies

Compatibility

Designed for use with standard 1/4-inch NPT female extension handles and rotary brush-cleaning equipment commonly used in HVAC, plumbing, and industrial tube maintenance applications.

Installation Notes

This brush is installed by licensed HVAC technicians or plumbers during scheduled maintenance or service calls on tube-and-shell heat exchangers, boilers, or condenser assemblies. Before inserting the brush, ensure the system is fully de-energized, depressurized, and drained per standard lockout/tagout procedures. Thread the 1/4-inch male NPT end securely onto the extension rod before use to prevent separation during operation. Use appropriate eye and hand protection when working with steel wire brushes on tube cleaning tasks.