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The PARKER 12MBT12N-B is a brass male branch tee fitting designed for use in compression tube systems requiring a three-way connection. It features dual compression ends and one male NPT (MNPT) outlet, allowing a branch takeoff from a compression run while connecting to a threaded port. Rated to 1900 psi maximum working pressure, this fitting is built for demanding fluid and pneumatic systems. The all-brass construction provides corrosion resistance and reliable sealing performance. Licensed plumbers, HVAC technicians, and industrial pipe fitters install this type of fitting in refrigeration, fuel gas, and instrument tubing applications.
This fitting is suited for residential and commercial installations where a compression tube line must branch off to a male-threaded port. Typical applications include instrumentation lines, compressed air distribution, fuel systems, and refrigerant tubing runs. The 3/4 inch thread size accommodates standard MPT connections. Its single-piece brass body makes it a dependable choice in both high-pressure and corrosive-environment service scenarios where threaded and compression connections meet at one junction point.
Designed as an OEM-style replacement and standard-service compression branch tee for fluid, pneumatic, and instrumentation tubing systems using 3/4 inch MPT connections. Cross-references Swagelok part number B-1210-3-12TTM.
Installation should be performed by a licensed plumber, HVAC technician, or qualified industrial pipe fitter. Shut off and depressurize the system completely before disassembling any fittings or installing new components. Ensure compression tube ends are cut cleanly and squarely and that all ferrules are properly seated before tightening. Consult applicable codes, including IPC and IFGC, for thread engagement and pressure-testing requirements in your jurisdiction.
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