Parker 4MBT4N-B Compression Male Branch Tee 1/4 in Brass

Product Description

The PARKER 4MBT4N-B is a brass compression tube male branch tee designed for high-pressure fluid and gas line applications. It features a Compression x Compression x MNPT end connection configuration with a 1/4 inch male pipe thread (MPT) port, allowing a branch takeoff from an existing compression tube run while providing a threaded male outlet. Rated to a maximum working pressure of 3500 psi, this fitting is suited for demanding instrumentation, hydraulic, and pneumatic systems where leak-free performance and pressure integrity are required. Plumbers, pipefitters, and instrumentation technicians typically install this component in tube and pipe assemblies.

This fitting is used in residential and commercial applications where a compression tube line requires a branch connection with a male NPT outlet. Common installation scenarios include instrument tubing runs, refrigeration and HVAC copper tube assemblies, pneumatic control lines, and high-pressure fluid systems. The all-brass construction provides corrosion resistance in both wet and dry service environments. The 1/4 inch thread size suits smaller-diameter tube runs typical in control and instrumentation work.

Key Features

• Maximum working pressure of 3500 psi for high-pressure service
• Compression x Compression x MNPT end connections for flexible tube-to-thread branch configurations
• 1/4 inch MPT thread size on the male NPT port
• Brass construction for corrosion resistance and durability
• Compact branch tee design allows inline tube continuation with a threaded side outlet

Compatibility

Designed as an OEM-style replacement and standard-service compression fitting compatible with 1/4 inch compression tube systems using MPT threaded branch connections. Cross-reference Swagelok part number B-400-3-4TTM for equivalent fitment.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified instrumentation technician. Depressurize and isolate the line completely before disassembly or fitting installation. Compression fittings require proper tube squareness and deburring for a leak-free seal — do not overtighten, as this can deform the ferrule and compromise the connection. Verify thread engagement and pressure ratings against system specifications before returning the line to service.