Section 108.477 - Fire hydrants(a) If a fixed foam extinguishing system has outlets in a main machinery space, at least 2 fire hydrants, in addition to the fire hydrants required by § 108.423 of this subpart, must be installed outside the entrances to the space with each at a separate entrance.(b) Each hydrant must have enough hose to spray any part of the space.(c) Each hydrant must have a combination nozzle and applicator.