Schaefer Brush 43656 Tube Brush 3 in Brass Bristles

Product Description

The SCHAEFER BRUSH 43656 is a double stem, single spiral tube brush designed for cleaning the interior surfaces of tubes, pipes, and cylindrical passages. Built with brass bristles and a brass brush body, it delivers firm but non-sparking scrubbing action suitable for use on copper, brass, and other soft-metal tube interiors. The brush measures 3 inches in diameter with an overall length of 8 inches and a brush or scraper length of 4.5 inches. The 0.25-inch NPSM male threaded connection allows attachment to standard extension rods or handles, making it practical for reaching into deep or confined passages.

This tube brush is suited for HVAC, plumbing, and refrigeration service work where tube and heat exchanger cleaning is required. Common applications include cleaning condenser and evaporator tubes, copper water pipe interiors, and similar cylindrical surfaces prior to inspection, brazing, or reassembly. The brass construction makes it appropriate for use in environments where ferrous bristles could contaminate or scratch sensitive tubing materials.

Key Features

• Double stem, single spiral construction provides consistent radial bristle contact along the full brush length
• Brass bristles and brush body for non-sparking, non-ferrous tube cleaning
• 3-inch diameter covers standard-size tube and pipe interiors
• 4.5-inch brush length delivers thorough coverage in a single pass
• 0.25-inch NPSM male connection compatible with standard extension handles and rods
• 8-inch overall length provides reach into deeper passages without an extension

Compatibility

Designed as an OEM-style replacement or service brush for use in residential and commercial tube and pipe cleaning applications where a 3-inch diameter brass tube brush with NPSM male threading is required.

Installation Notes

A licensed HVAC technician or plumber should shut down and de-pressurize any system before inserting this brush into active lines or heat exchanger tubes. Verify the NPSM thread engagement on any extension rod is secure before applying rotational force to avoid accidental disconnection inside a tube. Brass bristles are not recommended for use inside ferrous pipe where bristle contamination could cause downstream corrosion concerns.