Schaefer Brush 43222 Flue Brush 2.25 in Tempered Steel Wire

Product Description

The SCHAEFER BRUSH 43222 is a double stem, single spiral flue brush designed for cleaning flue passages, vent pipes, and combustion exhaust channels in heating systems. Built with tempered steel wire bristles, it delivers the mechanical scrubbing force needed to break loose soot, scale, and debris from metal flue surfaces. The brush measures 2.25 inches in diameter with a 4.5-inch brush length and a 7.5-inch overall length. The 0.25-inch NPSM male connection allows it to attach to standard extension rods for reaching deep into flue runs. Installed by HVAC technicians, chimney sweeps, and heating system service professionals during routine maintenance or pre-season inspections.

This flue brush suits residential and light commercial applications where flue passages, B-vent connectors, or metal exhaust channels require mechanical cleaning. The 2.25-inch diameter targets smaller-diameter flue liners and connector pipes commonly found in gas and oil-fired furnaces, boilers, and water heaters. The threaded male connection is compatible with standard rod extension systems, making it practical for straight or offset flue runs where direct hand access is not possible.

Key Features

• Tempered steel wire construction provides aggressive scrubbing action on soot and scale buildup
• Double stem, single spiral design maintains consistent brush contact along the full stroke
• 2.25-inch diameter sized for small to mid-range residential flue passages
• 0.25-inch NPSM male connection fits standard flue brush extension rod systems
• 4.5-inch brush length covers a meaningful cleaning area per pass
• Lightweight at 0.4 pounds for easy handling during extended service work

Compatibility

Designed as an OEM-style replacement and standard service brush for residential and light commercial flue cleaning applications requiring a 2.25-inch diameter tempered steel brush with a 0.25-inch NPSM male threaded connection.

Installation Notes

Shut down and allow the heating appliance to cool completely before beginning any flue cleaning service. HVAC technicians and chimney service professionals should wear appropriate respiratory and eye protection when working in flue passages. Connect the brush to compatible extension rods before inserting into the flue, and always work in the direction recommended by the appliance manufacturer to avoid dislodging debris into the heat exchanger or combustion chamber. Flue cleaning work on gas and oil appliances should comply with applicable NFPA and local mechanical codes.