3/8 inch OD Brass Flared Union Flare x Flare

3/8" OD Brass Flared Union – Compression Fitting for Metal Tubing Connections

The 3/8" OD Brass Flared Union is a two-piece fitting designed to connect sections of metal tubing in fluid and gas distribution systems. This union features 45° flared end connections that mechanically seal against corresponding flared tubing, eliminating the need for soldering, threading, or adhesives. Suitable for both low- and medium-pressure applications, it supports system integrity in residential, commercial, and industrial piping layouts.

Constructed from lead-free brass, this union meets modern compliance standards for potable water and gas systems while offering corrosion resistance and high mechanical stability. The compact profile and reusable design make it ideal for applications where disassembly and reassembly may be required for maintenance or inspection.

Key Features and Performance

• ✅ 45° Flared End Connections: Ensures a metal-to-metal seal that resists vibration, thermal expansion, and pressure variation.
• ✅ Lead-Free Brass Body: Manufactured in accordance with low-lead regulations (typically <0.25% weighted average), suitable for potable systems.
• ✅ Reusability: Union design allows system disconnection without damaging tubing or threads.
• ✅ Dimensional Compatibility: Sized for 3/8" OD soft copper or aluminum tubing as per SAE J512 or ANSI B1.20.1 standards.
• ✅ Temperature and Pressure Range: Typically rated up to 200°F and 150–200 psi, depending on system and tubing specification.

Installation Guidelines

• Ensure tubing ends are square-cut, deburred, and flared using a 45° flaring tool approved for the tubing material.
• Do not use thread sealant or tape on flare threads; the seal is made at the flare face.
• Torque according to manufacturer recommendations to avoid overtightening and cracking of the flare seat.

Application Areas

This flared union is commonly used in gas service lines, refrigeration loops, hydraulic control lines, and potable water connections where disassembly may be needed. Typical systems include HVAC units, fuel oil burners, and point-of-use installations requiring vibration resistance or high-temperature operation.

Material Consideration

Brass provides thermal conductivity, machinability, and chemical resistance, making it well-suited for both hot and cold water, air, fuel gases, and non-corrosive fluid systems. Flared fittings are especially effective where soldering is impractical or code-restricted.

The 3/8" OD Brass Flared Union offers a mechanically reliable, serviceable connection for joining tubing in pressure and thermal-variable environments, compliant with industry standards and suitable for long-term system performance.