Schaefer Brush 43642 Tube Brush 1-3/4 in Brass Bristles

Product Description

The SCHAEFER BRUSH 43642 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and cylindrical passages. It measures 1.75 inches in diameter with an overall length of 8 inches and a brush scrubbing length of 4.5 inches. The bristles and brush body are both brass construction, making the brush well suited for applications where corrosion resistance and non-sparking contact are required. It connects via a 0.25 inch NPSM male thread, allowing attachment to extension handles or standard brush holders. This brush is commonly used by HVAC technicians, plumbers, and maintenance professionals in tube cleaning and preventive maintenance tasks.

This tube brush is intended for use in residential and commercial settings where internal pipe or tube surfaces require mechanical cleaning. Typical applications include boiler tube cleaning, heat exchanger maintenance, condenser tube service, and general plumbing pipe preparation. The brass bristle construction makes it appropriate for use on copper, brass, and softer alloy tubing where steel bristles could cause damage or contamination. The threaded male connection supports use with extension rods for reaching deep into tube bundles or longer pipe runs.

Key Features

• Double stem, single spiral construction provides consistent bristle contact along the full brush length
• 1.75 inch diameter brush head sized for standard tube and pipe interior cleaning
• 4.5 inch brush scrubbing length covers substantial interior surface area per pass
• Brass bristles and brass body resist corrosion and are non-sparking
• 0.25 inch NPSM male threaded connection for use with extension handles and brush holders
• Lightweight at 0.32 pounds for extended use without hand fatigue

Compatibility

Designed as a replacement or service brush for tube and pipe cleaning applications requiring a 1.75 inch diameter brass tube brush with a 0.25 inch NPSM male threaded connection.

Installation Notes

This brush is installed by threading the 0.25 inch NPSM male connection into a compatible brush holder, extension rod, or drill chuck adapter before use. Always confirm the connection is fully engaged before operating to prevent separation inside a tube or pipe. When used with a rotary drill, keep rotational speed moderate to avoid excessive bristle wear or brush distortion. Brass bristles are suitable for softer metals but should not be used on surfaces requiring sterile or contamination-free preparation without verifying material compatibility.