1-1/2 inch Brass AutoFlare Gas Coupling

1-1/2 Inch Brass AutoFlare Gas Coupling – Mechanical Flare Connection

The 1-1/2 inch brass AutoFlare coupling is a mechanically flared gas fitting designed for use with stainless steel corrugated gas piping systems (such as CSST). It provides a secure, metal-to-metal seal without soldering or threading, and is used to join CSST tubing to other system components in indoor and outdoor gas distribution systems.

Engineered for Secure Gas Distribution

This coupling features integrated AutoFlare technology, which forms a flare during installation using the pipe's own profile and specialized insert. Key technical attributes include:

• ✅ Forged Brass Body – Corrosion-resistant brass construction rated for natural gas and propane distribution.
• ✅ AutoFlare Design – Eliminates the need for traditional flare tools by using an internal sleeve to cold-form the flare during compression.
• ✅ Vibration-Resistant Seal – Maintains joint integrity in applications subject to movement, pressure cycling, or temperature variation.
• ✅ Compatible with CSST – Designed for use with approved corrugated stainless steel tubing, facilitating transitions at appliances or manifolds.

Installation Considerations

Assembly requires proper pipe end preparation per CSST manufacturer specifications. Use of thread sealant or PTFE tape is required on male NPT threads, but not on the flare seat. Torque values should follow the manufacturer’s guidelines to ensure proper compression and sealing without over-tightening.

Performance Specifications

• Nominal Size: 1-1/2 inch
• Material: Lead-free forged brass
• Connection Type: Mechanical AutoFlare x Male/Female Thread (varies by configuration)
• Certification: CSA ANSI Z21.24 / ANSI LC-1 listed for fuel gas systems
• Pressure Rating: Up to 5 psi (34.5 kPa) for gas distribution lines

Application Overview

Commonly used in commercial and residential gas distribution systems to terminate CSST piping runs at appliances, manifolds, meter outlets, or transition points. Frequently specified in mechanical rooms, crawlspaces, or appliance enclosures where space constraints and flexibility are factors.

Compliance Note

All brass flare fittings for gas must meet applicable building and mechanical codes. The AutoFlare design is recognized in major code jurisdictions when used in accordance with certified system installation instructions.

The 1-1/2 inch Brass AutoFlare Gas Coupling delivers durable, code-compliant performance for mechanical contractors requiring secure connections in corrugated gas piping systems. Designed for precision, repeatability, and long service life in demanding gas line applications.