Parker 225-4-4 Barbed Tube Union Elbow Brass

Product Description

The PARKER 225-4-4 is a brass barbed tube union elbow fitting designed to join two flexible tube lines at a 90-degree angle using barbed connections on both ends. The barbed design creates a secure mechanical grip on the tubing without the need for additional hardware, making it a reliable choice for low-pressure fluid and pneumatic tubing assemblies. This fitting has a tube inside diameter of 0.17 inches and accepts tubing with a 0.25 inch outside diameter. Plumbers, HVAC technicians, and fluid-system installers commonly specify this type of union elbow when routing tubing through tight spaces or around obstacles in a system layout.

This union elbow is suited for light-duty plumbing, pneumatic control lines, HVAC condensate or sensor tubing, and similar small-bore tubing applications found in both residential and light commercial installations. The all-brass construction provides corrosion resistance and durability in environments where moisture or mild chemical exposure is a factor. Its compact size makes it practical for use in equipment cabinets, control panels, and tight equipment bays where rigid fittings would be difficult to install.

Key Features

• 90-degree union elbow configuration allows direction changes in tubing runs without additional fittings
• Barbed ends on both sides grip tubing mechanically for a secure, tool-free connection
• Brass construction resists corrosion in wet and humid service environments
• 0.17 inch inside diameter matches common small-bore flexible tubing sizes
• Compact and lightweight at 0.01 pounds, suitable for confined installation spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for flexible tubing with a 0.25 inch outside diameter and 0.17 inch inside diameter, typical of small-bore pneumatic and fluid-transfer tubing used in HVAC, plumbing, and light industrial applications.

Installation Notes

This fitting is installed by trained plumbing or HVAC technicians. Before servicing any tubing line, shut off the fluid or air supply and relieve system pressure. Insert tubing fully over each barb to ensure a complete seal, and consider using a tubing clamp for added retention in higher-flow or vibration-prone applications. Follow applicable IPC or IFGC guidelines for the system type being serviced.