Schaefer Brush 43762 Spiral Tube Brush 3.75in Nylon

Product Description

The SCHAEFER BRUSH 43762 is a single stem spiral tube brush designed for cleaning the interior walls of tubes, pipes, and cylindrical passages. The brush features nylon bristles mounted on a spiral stem configuration, delivering consistent radial contact across the full bore of the target opening. At 3.75 inches in diameter with a 7.25-inch overall length and a 5-inch brush length, this tool reaches deep into passages while the nylon bristle material resists solvents and mild chemicals. The 1/4-inch male NPSM threaded connection allows the brush to be mounted to extension rods or drill chucks for powered or manual operation. HVAC technicians, plumbers, and maintenance professionals use this brush for tube cleaning in heat exchangers, condensers, and piping systems.

This spiral tube brush suits light to medium cleaning tasks in residential and commercial maintenance applications. It is well suited for clearing scale, debris, and deposits from tube interiors during preventive maintenance or equipment servicing. The nylon bristle construction makes it appropriate for use where metallic bristles could score or damage softer tube materials. Typical installers include HVAC service technicians performing condenser or heat exchanger maintenance and plumbers cleaning pipe interiors prior to fitting installation.

Key Features

• 3.75-inch brush diameter provides full-contact coverage inside matching tube bores
• 5-inch brush length reaches deep into tubes and passages
• Nylon bristles resist common solvents and mild cleaning agents without scoring tube walls
• 1/4-inch male NPSM threaded connection compatible with standard extension rods and drill adapters
• Spiral stem design maintains consistent bristle pressure around the full circumference
• Lightweight at 0.44 pounds for extended use without fatigue

Compatibility

Designed as an OEM-style replacement or direct-use spiral tube brush for cleaning cylindrical passages in HVAC, plumbing, and general industrial maintenance applications where a 3.75-inch diameter brush with a 1/4-inch male NPSM threaded connection is required.

Installation Notes

This brush is installed by threading the 1/4-inch male NPSM connection into a compatible female fitting, extension rod, or drill chuck adapter. Verify the target tube bore diameter matches the brush diameter before use to ensure effective cleaning contact without overstressing the bristles. When using with a powered drill, start at low speed and increase gradually to maintain control. Follow all applicable safety procedures when working inside pressurized systems, including depressurizing and isolating the system before inserting any cleaning tool.