A multi-functional diverter tee is an economical and easy-to-install fitting that combines multiple uses into one unit. The additional branch pipe provided in the fitting offers users convenient operation, including installation of instruments, sample withdrawal, or connection to other pipes, etc. This product is mainly used for quick diversion of gas, oil, and drainage pipelines without the need to disassemble pipes, and can be used for quick and pressure-resistant diversion. The branch connection parts style: straight-through internal thread fitting, external thread fitting, flange fitting, etc.