Schaefer Brush 43651 Tube Brush 2.5in Brass Bristles

Product Description

The SCHAEFER BRUSH 43651 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and cylindrical passages in HVAC, plumbing, and industrial maintenance applications. Built with brass bristles and a brass brush body, it measures 2.5 inches in diameter with an overall length of 8 inches and a brush scraper length of 4.5 inches. The 1/4 inch NPSM male connection makes it compatible with standard extension handles and drill chucks. HVAC technicians and plumbers reach for this brush when cleaning condenser tubes, drain lines, and similar bore surfaces where brass bristles will not damage softer metal interiors.

This tube brush suits residential and light commercial service work where interior bore cleaning is required before inspection, repair, or reassembly. The double stem construction adds rigidity, keeping the spiral centered in the bore during use. The single spiral configuration provides consistent bristle contact around the full circumference of the tube wall. The 1/4 inch male NPSM threaded connection allows the brush to be threaded onto standard extension rods or used with a hand drill for faster cleaning passes.

Key Features

• Brass bristles and brass brush body resist corrosion and will not scratch copper or soft alloy tube interiors
• Double stem construction maintains brush alignment and rigidity through the full bore length
• Single spiral wrap delivers uniform bristle pressure against tube walls
• 1/4 inch NPSM male connection threads onto standard extension handles or drill chucks
• Compact 8 inch overall length suits tight access areas in equipment cabinets and mechanical spaces

Compatibility

Designed as an OEM-style replacement tube brush suitable for use with standard 1/4 inch NPSM threaded extension rods and compatible with tube bore cleaning applications requiring a 2.5 inch diameter brush head.

Installation Notes

This brush is typically used by HVAC technicians and plumbers during routine maintenance or pre-repair cleaning of tube and pipe interiors. Shut off and isolate the system before inserting the brush into any pressurized line or heat exchanger tube. Thread the NPSM connection firmly onto the extension handle before use to prevent separation inside the bore. Wear appropriate eye protection when operating the brush with a drill to contain dislodged debris.