Schaefer Brush 43742 Spiral Tube Brush 1-3/4 in Nylon

Product Description

The SCHAEFER BRUSH 43742 is a single stem spiral tube brush designed for cleaning the interior of tubes, pipes, and small-bore fittings. Built with nylon bristles on a nylon brush body, it scrubs without scratching or reacting with most chemical residues encountered in HVAC, plumbing, and pool service work. The brush measures 1.75 inches in diameter with an overall length of 7.25 inches and a brush or scraper length of 5 inches. A 1/4-inch NPSM male connection at the stem end allows it to thread directly onto compatible extension handles or drive rods for controlled, repeatable cleaning strokes.

This tube brush suits residential and light commercial applications where internal bore cleaning is part of routine service or installation prep. Common uses include clearing debris from condensate drain lines, cleaning the inside of pipe fittings before solder or threading, scrubbing heat exchanger tubes, and maintaining pool and spa plumbing components. The nylon construction makes it safe for use in copper, PVC, CPVC, and stainless steel tubing without scoring the bore wall. Technicians in HVAC, plumbing, and pool service trades will find it a straightforward shop and field tool.

Key Features

• 1.75-inch brush diameter cleans tube bores in a single pass without over-flexing bristles
• Nylon bristles resist moisture, mild chemicals, and corrosion for repeated use
• 5-inch brush length provides full contact across standard fitting and tube sections
• 7.25-inch overall length gives adequate reach into shallow pipe runs without an extension
• 1/4-inch NPSM male connection threads onto standard extension rods and handle adapters
• Single stem spiral construction maintains consistent bristle contact around the full bore circumference

Compatibility

Designed as a standard single stem spiral tube brush for use in any tube or bore measuring approximately 1.75 inches in diameter where a 1/4-inch NPSM male connection is compatible with the drive handle or extension rod in use.

Installation Notes

A licensed plumber, HVAC technician, or pool service professional typically handles tube cleaning as part of maintenance or installation prep. Before using this brush in an active system, shut off flow and depressurize the line to prevent debris from being driven into downstream components. Thread the male connection firmly onto the extension handle before inserting into the bore to avoid disconnection mid-stroke. Inspect bristles before each use and replace the brush if bristle loss is evident, as loose nylon fibers can clog downstream fittings.