What's the fire hydrant interface?
You ask is not detailed, I guess you might ask is the three interface size of the outdoor fire hydrant above is not the same, the reasons are as follows: the most common outdoor fire hydrant ground hydrant has three interfaces, two 65MM diameter, a 100MM diameter, 65MM diameter corresponding to the water interface, usually a bayonet 100MM, the corresponding caliber fire truck water pipe, usually thread, to explain the end.
Indoor fire hydrant in the heart of DN50DN65DN80 three ~ generally use DN65 ~ other manufacturers are basically non-standard ~!If it is three kinds of outdoor fire hydrant interface is DN65DN100DN150, DN150 is not commonly used, atlas on interpretation is needed and the local fire brigade, so only 65-100 that ~ but also the different ground and underground ~ you can query the relevant atlas Atlas 01S201 outdoor fire hydrant.
There are two indoor fire hydrant DN65 and DN50, more common,You can see the model outside,SS150/80-1.6, it means: SS stands for ground hydrant, 150/80 stands for water inlet, caliber is 150mm, outlet diameter is 80mm and 150mm, 1.6 represents nominal pressure 1.6MPa.SS100/65-1.6 outdoor outdoor hydrant, water outlet is 100 and 65, nominal pressure is 1.6MPa
