2-1/8" x 27" Fiber Brush

Mill-Rose 39961 Fiber Pipe Brush – 2-1/8" Diameter, 27" Length

The Mill-Rose 39961 Fiber Brush is engineered for internal cleaning of tubing, pipe, fittings, and flue systems. Featuring a 2-1/8 inch diameter and extended 27-inch overall length, this brush is well-suited for general-purpose applications requiring access to deeper pipe interiors or hard-to-reach areas. The dense fiber construction provides controlled abrasion without damaging base materials, making it suitable for maintenance in plumbing, HVAC, and mechanical systems.

Product Features

• Brush Diameter: 2-1/8 inches
• Overall Length: 27 inches
• Bristle Material: Natural horsehair fiber
• Handle Type: Twisted wire core
• Application: Cleaning inside piping, fittings, boiler tubes, and flue passages

Performance and Durability

The horsehair bristles provide moderate scrubbing power, ideal for removing soot, buildup, and deposits without scoring or damaging sensitive surfaces. The twisted-wire handle delivers rigidity and reach for internal cleaning in horizontal or vertical piping. Suitable for stainless steel, copper, brass, or other non-ferrous systems where metal brush abrasion is not recommended.

Compatible Uses

• Boiler tube cleaning
• Flue pipe maintenance
• Preparation of pipe interiors prior to soldering or bonding
• HVAC ductwork cleaning

Operational Guidance

No installation is required. The brush can be used manually or in conjunction with a flexible rod system, depending on application access. Always verify the brush diameter matches the interior diameter of the piping system to ensure proper contact and effective cleaning. Protective equipment is recommended during use in contaminated or high-soot environments.

Contractor-Focused Value

• Non-Marring Fiber – Gentle yet effective cleaning on softer metals or coatings
• Extended Reach – 27" length allows cleaning access beyond the entry point
• Field Durability – Suitable for job site and shop use across a range of maintenance tasks

The Mill-Rose 39961 fiber brush is a practical tool for professionals maintaining piping systems, heat exchangers, and mechanical equipment. Its durable construction and industry-standard design offer dependable performance where surface protection and effective cleaning are required.