The hose used by the firemen to extinguish the blaze has obviously never been pressurized, and it has an obsolete nozzle.
The bathroom door supposedly has to be chopped off in order to fight the fire. However, the door opened into the bathroom and was left open after Wojo tried to put the fire out with an extinguisher. Furthermore, there are no signs of char or burnt wood anywhere on the door.
When Vitella sets the fire in the Men's room, Wojo has to go and retrieve a fire extinguisher from another location, which allows the fire to increase in intensity. In previous and subsequent episodes, a fire extinguisher is mounted on the wall opposite the men's room. It's missing in this one.
The detectives scramble for something to extinguish the fire, seemingly forgetting that there is a wall mounted fire hose outside the door in the hallway.