The file '1.5 NPHS Female To 2.5 NHPS Male Adaptor 3D Printer Model' is (stl) file type, size is 1.4MB.
This is a 1.75 NPSH female to 2.5 NPSH male adaptor. This is intended to be used as a fire hose adaptor for filling the pump with a inch and three-quarter line. This is still a work in progress.
tinkercad- https://www.tinkercad.com/things/gXVf4XEuwGj
1.75_to_2.5_fire_hose_addapter.stl | 4.5MB |