Midland Industries 641200M Dot Union Tee 12mm Brass

Product Description

The MIDLAND INDUSTRIES 641200M is a Department of Transportation (DOT) rated union tee fitting designed for pneumatic and fluid line connections in mobile and commercial applications. This brass fitting uses a push-to-connect interface on all three ports, allowing fast, tool-free connections. It is rated for 150 psi working pressure and handles temperatures from -40 to 200 degrees F. The all-brass construction provides corrosion resistance and durability in demanding environments. Licensed plumbers, fluid power technicians, and heavy equipment technicians typically install this type of fitting on air brake systems and other DOT-compliant pneumatic circuits.

The 641200M union tee accepts 12mm tubing on all three ports, making it a straight equal-tee configuration for splitting or combining flow in a single-size line run. Common install scenarios include air brake plumbing on commercial vehicles, trailers, and other DOT-regulated mobile equipment. The push-to-connect design reduces installation time and allows the fitting to be serviced without special crimping or flaring tools. This fitting is suited for both new builds and field repair situations where a reliable, removable tee connection is needed in a 12mm line.

Key Features

• All three ports accept 12mm push-to-connect tubing for an equal union tee configuration
• DOT-rated construction meets Department of Transportation requirements for mobile pneumatic systems
• 150 psi working pressure rating for high-demand pneumatic circuits
• Operating temperature range of -40 to 200 degrees F for extreme-condition service
• Brass body provides corrosion resistance and long service life
• Push-to-connect design allows tool-free installation and field serviceability

Compatibility

Designed as an OEM-style replacement or new-installation fitting for DOT-compliant pneumatic systems using 12mm outside-diameter tubing, including air brake and air supply circuits on commercial vehicles and trailers.

Installation Notes

Installation should be performed by a qualified technician familiar with DOT air brake and pneumatic system regulations. Depressurize and isolate the air system completely before removing or installing any fitting. Ensure tubing is cut cleanly and squarely, and is fully seated in the push-to-connect port before returning the system to service. Verify the completed connection meets applicable DOT inspection requirements before placing the vehicle back in service.