Parker 821FR-4-BLK-RL Push-on Air Hose 0.25 in Id 350 Psi

Product Description

The PARKER 821FR-4-BLK-RL is a push-on air hose designed for compressed-air distribution in industrial and trade service environments. Built from black synthetic rubber, this hose features a 0.25 inch inside diameter and a 0.50 inch outside diameter. It carries a working pressure rating of 350 psi and handles a temperature range of -40 degrees F to 212 degrees F, making it suitable for demanding shop and field applications. The hose is sold in cut-to-length increments of 1 foot with a 25-foot minimum cut, pulled from a 575-foot coil. Licensed contractors and shop technicians working with pneumatic tools, air lines, and compressed-air distribution systems are the primary installers.

This hose fits residential and commercial pneumatic service installations where a flexible, push-on connection is required without reusable end fittings at the hose stage. The push-on design seats directly onto compatible barbed fittings, eliminating the need for clamps in low-assembly applications. It is commonly run in compressor rooms, service bays, and on-site pneumatic tool circuits. The cut-to-length format lets technicians size each run precisely for the job, reducing waste on multi-drop air systems or custom hose assemblies.

Key Features

• Push-on construction seats onto barbed fittings without clamps
• 350 psi working pressure rating for compressed-air service
• Synthetic rubber construction for flexibility and durability
• Wide temperature range: -40 degrees F to 212 degrees F
• 0.25 inch inside diameter with 0.50 inch outside diameter
• Sold in 1-foot increments from a 575-foot coil, 25-foot minimum cut

Compatibility

Designed for use with standard push-on barbed fittings sized for 0.25 inch ID air hose in compressed-air plumbing and pneumatic tool supply applications.

Installation Notes

Installation is typically performed by pipefitters, HVAC-R technicians, or pneumatic systems mechanics. Depressurize and lock out the air supply before cutting or connecting hose sections. A clean, straight cut ensures full seating on barbed fittings and a proper seal. Verify that system working pressure does not exceed the 350 psi rating of this hose.