Schaefer Brush 43284 Flue Brush 2.25 in Dia 7.5 in Oal

Product Description

The SCHAEFER BRUSH 43284 is an extra heavy filled double stem, single spiral flue brush designed for cleaning flue passages, heat exchangers, and combustion venting in residential and light commercial heating systems. Built with tempered steel wire fill, this brush aggressively removes soot, scale, and debris from metal flue surfaces without losing shape under repeated use. The brush section measures 4.5 inches in length with a 2.25-inch diameter, giving it the coverage needed to scrub standard round flue openings. Overall length is 7.5 inches. The 3/8-inch NPSM male connection allows the brush to attach to standard extension rods for deeper reach into vent systems.

This flue brush is used in routine HVAC preventive maintenance, chimney and venting service, and boiler flue cleaning. It is suited for residential gas and oil-fired furnaces, boilers, and water heaters where flue passages require periodic clearing to maintain draft performance and combustion efficiency. HVAC technicians and heating service professionals typically deploy this brush during annual tune-up and inspection work. Its heavy fill density makes it effective in flues where light brushes fail to clear baked-on deposits.

Key Features

• Extra heavy fill density for aggressive cleaning of fouled flue passages
• Tempered steel wire bristles resist deformation under repeated use
• 2.25-inch diameter brush section fits standard round residential flue openings
• 4.5-inch brush length provides substantial scrubbing surface per pass
• 3/8-inch NPSM male connection is compatible with standard extension rod systems
• Double stem, single spiral construction maintains brush shape and bristle retention

Compatibility

Designed as an OEM-style replacement and maintenance tool for residential and light commercial heating system flue cleaning applications where a 2.25-inch diameter brush with a 3/8-inch NPSM male connection is specified.

Installation Notes

Flue brush service should be performed by a qualified HVAC technician or heating service professional. Before beginning any flue cleaning, shut down the heating appliance and allow the system to cool completely. Attach the brush to compatible extension rods before inserting into the flue passage, and work in sections to avoid dislodging debris into the combustion chamber. Follow applicable local codes and manufacturer service procedures when cleaning venting systems.