Schaefer Brush 43660 Tube Brush 3.5 in Dia Brass

Product Description

The SCHAEFER BRUSH 43660 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and bores. With a 3.5-inch brush diameter and an 8-inch overall length, it reaches into standard-diameter tubing and cleans along a 4.5-inch brush contact zone. The brass bristle construction resists corrosion and is safe for use on softer metal surfaces without scoring or scratching. Technicians in HVAC, plumbing, and general maintenance use this type of brush to remove scale, debris, and fouling from tube ends, heat exchanger tubes, and pipe interiors before fitting or inspection.

This brush is suited for light to medium-duty tube cleaning in both residential and commercial service applications. The 0.25-inch NPSM threaded connection allows attachment to standard extension rods or handles, making it practical for inline cleaning tasks where direct hand access is limited. It is commonly used during heat exchanger service, condenser tube cleaning, and pipe fitting preparation. The brass bristle material makes it compatible with copper, aluminum, and other non-ferrous tubing without risk of galvanic contamination or surface damage.

Key Features

• Double stem, single spiral construction provides consistent bristle contact around the full tube interior circumference
• 3.5-inch brush diameter suits standard tube and pipe bore sizes in HVAC and plumbing applications
• Brass bristles resist corrosion and are safe on copper, aluminum, and other non-ferrous surfaces
• 4.5-inch brush length delivers thorough cleaning coverage per stroke
• 0.25-inch NPSM threaded connection is compatible with standard extension rod systems
• Compact 8-inch overall length suits both handheld and rod-extended use

Compatibility

Designed as an OEM-style replacement and standard service brush for residential and commercial tube-cleaning applications requiring a 3.5-inch diameter, double stem, single spiral configuration with a 0.25-inch NPSM threaded connection.

Installation Notes

This brush is typically used by HVAC technicians and plumbers during scheduled maintenance or repair service. Before cleaning any tube or pipe, shut off the system and relieve any pressure in the line per applicable IPC or IFGC guidelines. Thread the brush onto a compatible extension rod hand-tight before use and inspect bristles for wear or splaying before each application. Do not force an oversized brush into a tube bore, as this can deform bristles and reduce cleaning effectiveness.