Unequal Tee branch broadness is more fair than fundamental division over. ASME B16.11 Threaded Reducing Tee is constantly depicted as NPS gets out across in 4" x 4" x 3", where 4" is the principal line pipe broadness, and 3" is the lessening branch. Set Steel Threaded Unequal Tee has making and bundling measure. So there are male tee and female tee, which if the chamber with male NPT ... https://www.shasanpiping.com/threaded-unequal-tee-elbow-manufacturers-exporters-suppliers-stockists.html