Parker B20-4B Hose Barb Pneumatic Coupler 1/4 in Brass

Product Description

The PARKER B20-4B is a hose barb industrial pneumatic coupler designed for connecting flexible hose to pneumatic systems and compressed air lines. Constructed from brass, this coupler features a 1/4 inch body diameter and is sized to accept a 5/16 inch hose ID. The barbed design provides a secure, slip-resistant connection without requiring additional fittings or clamps in low-to-medium pressure pneumatic applications. Licensed HVAC techs, plumbers, and general contractors install this type of fitting when routing compressed air or pneumatic control lines through equipment enclosures, service panels, and mechanical rooms.

This coupler is suited for residential and light commercial pneumatic applications where a reliable hose-to-fitting connection is required. Typical installations include compressed air tool lines, pneumatic control systems, and general industrial air distribution setups. The brass construction makes it appropriate for dry air and mild service environments. It ships in single-piece quantity, making it a practical choice for maintenance, repair, and replacement scenarios.

Key Features

• Brass construction provides corrosion resistance in dry air and mild pneumatic service
• 1/4 inch body diameter for standard pneumatic hose coupler sizing
• Accepts 5/16 inch hose ID for a secure barbed connection
• Hose barb design creates a slip-resistant mechanical grip without additional hardware
• Compact and lightweight at 0.19 pounds for easy handling and installation

Compatibility

Designed as an OEM-style replacement or service fitting for standard 1/4 inch pneumatic hose coupler applications using 5/16 inch ID flexible hose in industrial and light commercial pneumatic systems.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or qualified mechanical contractors. Depressurize and lock out the compressed air supply before disconnecting or installing any pneumatic fitting. Inspect the hose end for cuts or deformation before seating it fully over the barb. Follow applicable ASME and local mechanical codes for compressed air line fittings and connections.