Schaefer Brush 43639 Tube Brush 1-1/2 in Brass Bristles

Product Description

The SCHAEFER BRUSH 43639 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and small-bore fittings. The brush features brass bristles wound in a single spiral pattern around a double-stem wire core, which provides consistent radial pressure along the full brush length. At 1-1/2 inches in diameter and 8 inches in overall length, with a 4-1/2 inch brush scraper length, it covers a practical cleaning stroke in one pass. The 1/4 inch male NPSM threaded connection allows it to attach to standard extension rods or drill chucks. It weighs 0.32 pounds. Plumbers, HVAC technicians, and pipefitters reach for this style of brush during tube cleaning, deburring, and light surface prep operations.

This brush is suited for residential and light commercial service work where internal tube surfaces require cleaning before soldering, brazing, or inspection. Typical applications include copper tubing, condenser and evaporator tubes, heat exchanger ports, and similar small-bore passages. The brass bristle construction makes it appropriate for use on copper, brass, and softer alloy tubing without the risk of surface damage associated with steel bristles. The NPSM male thread allows quick connection to brush extension handles commonly found in HVAC and plumbing service kits.

Key Features

• Double stem, single spiral construction delivers consistent radial bristle contact
• Brass bristles safe for use on copper, brass, and soft alloy tube interiors
• 1/4 inch male NPSM thread fits standard extension rods and drill chucks
• 4-1/2 inch brush length provides effective one-pass cleaning stroke
• Compact 0.32 pound weight for easy handheld or powered tool use

Compatibility

Designed as a standard replacement and service tube brush for use in applications requiring a 1-1/2 inch diameter, double stem single spiral brush with a 1/4 inch male NPSM connection.

Installation Notes

This brush is typically used by plumbers, HVAC technicians, and pipefitters during tube cleaning and surface preparation procedures. Ensure the system or line is fully depressurized and isolated before inserting the brush into any pipe or tube. Thread the NPSM connection fully onto the extension rod or chuck before operation to prevent detachment during use. Inspect bristles for wear or deformation before each use and replace if the brush diameter has reduced significantly.