SN fire hydrant, what does SN mean?
But now there is a room using the SN65 method is in the floor area is not large buildings, set two SN fire hydrant in the same position, why is this so, because according to the provisions on the same floor must be two to enrich the water column to the ignition point, but not a large area of the floor often took two a fire hydrant is set together. This is called double plug double valve.
If it is double valve double outlet, then 65 of the diameter should be 65/65 or 100/65, refers to the two 65 outlet, or 1, 100, 1, 65 outlet. Single valve double outlet is now out of use.
Fire hydrant model, SN65 means single valve, single outlet, and 65 caliber, so there's only one 65 here.
