Pferd 79189601 Horsehair Acid Brush 5/16 in Flux

Product Description

The PFERD 79189601 is a horsehair acid brush designed for applying flux during soldering, brazing, and pipe-joining operations. The brush features a tin handle with a 5/16 inch wide bristle head and a 6 inch overall length, making it easy to maneuver in tight spaces around fittings and connections. Black horsehair bristles measure 0.75 inches in length and hold flux well without shedding. Plumbers, HVAC technicians, and pipefitters keep these on hand as a standard consumable for sweat soldering copper pipe and fittings.

This acid brush is suited for residential and commercial plumbing, HVAC refrigerant line work, and light electrical applications where flux must be applied precisely to a joint before soldering or brazing. The narrow 5/16 inch bristle width targets small-diameter fittings and tight connection points without over-applying flux to surrounding surfaces. These are single-use or short-use consumables typically stocked in bulk by service technicians and shop fabricators.

Key Features

• Horsehair bristles resist acid-based flux without rapid degradation
• 5/16 inch bristle width for precise flux application on small fittings
• 6 inch overall length provides reach and control during soldering
• Tin handle construction — lightweight and corrosion-resistant
• 0.75 inch bristle length holds an adequate flux load per dip
• Single-piece disposable design reduces cross-contamination between flux types

Compatibility

Designed for use with flux in soldering and brazing applications. Suitable for copper pipe and fitting work common in plumbing and HVAC installations.

Installation Notes

Acid brushes are handled by licensed plumbers and HVAC technicians working under applicable plumbing and mechanical codes. Before soldering any joint, shut off the water supply or refrigerant system and ensure the pipe is fully dry. Apply flux only to the cleaned mating surfaces of the joint — do not allow excess flux to pool inside the pipe. Dispose of the brush after use or when bristles show signs of deterioration to avoid contaminating flux containers.