Schaefer Brush 43238 Flue Brush 4in Dia Single Spiral

Product Description

The SCHAEFER BRUSH 43238 is a double stem, single spiral flue brush designed for cleaning flue pipes, vents, and chimney liners in residential and light commercial heating systems. The brush head measures 4 inches in diameter with a 4.5-inch brush length, giving it solid surface contact inside standard round flue passages. The male 1/4-inch NPSM threaded connection allows it to attach to standard extension rods for reaching deeper into vertical or horizontal flue runs. Constructed with tempered steel wire bristles, it delivers durable, aggressive scrubbing action against soot, scale, and combustion deposits. Overall length with the stem is 7.5 inches. Licensed HVAC technicians and chimney service professionals are the primary installers and users of this tool.

This flue brush is suited for periodic maintenance cleaning of B-vent, single-wall metal flue pipe, and similar round flue passages found in gas furnaces, boilers, and water heaters. It is also used during annual inspection and cleaning service calls where soot and scale buildup must be removed from the interior flue wall. The 4-inch diameter targets common residential flue sizes. The threaded male NPSM connection makes it straightforward to couple with compatible extension rod sets for deeper reach in longer flue runs.

Key Features

• Tempered steel wire bristles provide durable scrubbing action against soot and scale
• 4-inch brush diameter sized for standard residential round flue passages
• 4.5-inch brush length delivers extended contact area per stroke
• 1/4-inch male NPSM threaded connection for use with standard extension rods
• Double stem, single spiral construction maintains consistent brush shape under load
• Compact 7.5-inch overall length for easy handling and storage

Compatibility

Designed as an OEM-style maintenance brush for 4-inch diameter round flue pipes and vent passages in residential gas furnaces, boilers, and water heaters. Compatible with standard 1/4-inch NPSM threaded extension rod sets.

Installation Notes

Always shut down and allow the appliance to cool completely before inserting any brush into the flue system. A licensed HVAC technician or certified chimney sweep should perform flue cleaning in accordance with applicable local codes and NFPA 211 guidelines. Attach the brush securely to extension rods before inserting into the flue to prevent the brush from becoming lodged. Wear appropriate respiratory and eye protection when dislodging soot and scale deposits.