Midland Industries 20128C Bulkhead Union 3/8 Push-to-connect

Product Description

The MIDLAND INDUSTRIES 20128C is a composite-body push-to-connect bulkhead union designed for tube-to-tube connections through a panel or partition wall. It accepts 3/8-inch tubing on both sides and locks in place without tools, making it a fast, reliable choice for compressed air, pneumatic control lines, and similar low-pressure fluid systems. The fitting is rated to 150 psi and operates across a temperature range of 32 to 140 degrees F. The composite body keeps weight low at 0.14 pounds and resists corrosion in environments where a metal fitting would be exposed to moisture or chemicals. Plumbers, HVAC technicians, and pneumatic system installers reach for this style of fitting when routing lines through enclosures, bulkheads, or equipment panels.

The 20128C suits residential and light commercial applications where 3/8-inch tubing must pass cleanly through a panel, cabinet wall, or mounting surface. Common install scenarios include pneumatic control systems, compressed air distribution panels, refrigeration equipment enclosures, and plumbing fixture rough-in assemblies. The bulkhead design allows the fitting to be secured to a surface with a nut or locknut, keeping the tubing run neat and the penetration sealed. It is appropriate for use with compatible push-to-connect tubing in dry and wet service environments within the rated pressure and temperature limits.

Key Features

• Push-to-connect on both ends - no tools required for tube insertion
• Rated to 150 psi working pressure
• Operating temperature range: 32 to 140 degrees F
• Composite body construction for corrosion resistance and reduced weight
• Bulkhead design for through-panel mounting and secure line routing
• 3/8-inch connection size on both sides for symmetrical inline use

Compatibility

Designed as an OEM-style replacement or new-installation fitting for pneumatic and fluid systems using 3/8-inch push-to-connect tubing routed through a panel or bulkhead surface.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or pneumatic systems technician. Before installing or replacing the fitting, depressurize the system completely and verify zero pressure at the connection point. Insert tubing straight and fully into each end of the fitting until it seats; inspect for a secure lock before repressurizing. Follow applicable local codes and the system manufacturer's guidelines for maximum allowable working pressure and temperature.