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mediate cisterns on the third floor, sufficient to store water
for the supplies of the hotel during any accident to the
water company's supply-pipe These cisterns have service-pipes
and overflow warning-pipes. One set of cisterns
has to be provided for the drinking-water, baths, and
lavatories; a second separate set for the service of waterclosets,
urinals, and slop-sinks exclusively.
2. Cold water service-pipes have to be led to all baths,
basins, sinks, and draw-off taps; also from the second set
of cisterns to all water-closets, urinals, and slop-sinks. All
water supplies, hot and cold, are provided with duplicate
guard-taps, as well as outlet-taps. The fire hydrants are
served by tank on roof, and also by company's main direct.
3. Hot-water mains (flow and return) are carried up
from heaters in the basement, and branches are led to
all baths, basins, sinks, and draw-off taps. The double sets
of mains (flow and return) are necessary in order to keep
the water in the pipes always in circulation and actually
hot at its outlet.
4. In order to warm the corridors, hot-water radiators
are placed at frequent points. These radiators have separate
heaters in the basement and separate sets of mains
(flow and return) to the radiators. In these radiators a
constant circulation of very hot water is maintained by
pumping.
Three separate systems of drainage channels permeate
all parts of the building, as follows: —
5. Excremental matters are allowed only to enter waterclosets,
urinals, and slop-sinks. These excremental matters
are conveyed away through a set of air and water-proof
four-inch ten-pound leaden drawn pipes. All these
pipes are carried up to the roof-ridge full-bore, and
are open to the sky so as to ensure the continuous ventilation
of their interior. Below, they unite their discharges,
without trap, in the main drain of the hotel, and the main
drain passes its contents off continuously into the public
sewer through the general outfall. This general outfall is
guarded by an interceptor, or trap, which allows free exit