- May 10, 2019
FDNY Tower Ladders have two siamese inlets with, I believe, 2 1/2 inch connections. At a few fires and in pictures where I have seen tower ladder master streams in operation, it appears that the water is supplied by one 3 1/2 inch line. Is this always the case or do they ever connect two 31/2 inch lines to supply the master stream ? If the piping built into the tower ladders can handle 1,000 gpm why not add at least another supply l;ine ?