This section is from the book "American Plumbing Practice", by The Engineering Record. Also available from Amazon: Plumbing: A working manual of American plumbing practice.
(Published In 1890.)
The Union Trust Company's new building on Broadway, New York City, is about 100 feet front. 120 feet deep, and has 13 stories above the basement. It is designed to accommodate a bank on the first floor and the offices of the Union Trust Company on the second floor, while the upper floors are fitted for offices; a restaurant, kitchen, etc., being built on the main roof.
The plumbing comprises, in general the hot and cold water supply to the toilet-rooms and to basins in all office rooms, and the drainage from all fixtures. The most of the water is pumped through the 4-incb pipe A, Fig. 1, to the iron roof tank T, that is about 14 feet square and 8 feet 6 inches deep, and is closed by iron plates over the top. The tank rests or wooden sills B B B, laid in a sheet-iron lined safe S, which is supported by wooden beams C C C, resting on the floor directly under the sills B B B. The tank overflows through a 4-inch pipe D to the roof gutter, and may be emptied, also to the roof gutter, through a key valve E and a 2-inch pipe F. H is a 2-inch supply pipe to the eighth and ninth floor toilet-rooms, and G is a 4-inch supply pipe to the distribution drums in the cellar. I I are 1-inch vent pipes to the pipes G and H. J is a vent pipe from the hot-water system, and L is the 1½ - inch safe waste, discharging on the roof. M is a wire cable from the tank float operating the index of the indicator in the pump-room
Water under street pressure is delivered through a 2-inch pipe A, Fig. 2, and ball cock B to the closed iron suction tank C, about 5x5 feet, that is in the cellar near the pumps. This tank overflows through a 4-inch pipe D, which has a trap with a 24-inch seal that is preserved by the constant discharge from the steam drip pipe I. E is a valve for emptying the tank F and G are 1¼ - inch pipes to empty the pump delivery to the tank and the 4-inch supply pipe from the tank to the distribution drums. H is the 4-inch suction pipe to the pumps.
Figure 3 shows the connections of the special tank pump A and one of the boiler pumps B. H is the 4-inch suction pipe from the tank C, Fig. 2, with a branch E to the pump B. D is the 4-inch delivery pipe to the roof tank with a branch F from the pump B. G is a 2-inch branch connected with the delivery pipe of another steam pump, generally used for the steam boilers. Ordinarily the valves M and N are open, while I is closed, and the tank is filled by the pump A; but if the valves I, K, and L are open the pump B can also be turned to the tank, and by opening the valve J the third pump may also be used for the tank in case of fire or in any other emergency.
Figure 4 shows the cellar drip tank A, which is simply an iron shell about 6 feet long and 30 inches in diameter, to receive the overflow from the suction tank C, Fig. 1, the waste from emptying the pipes of the distribution drums, discharge from drip-sinks and cellar drainage, all of which is below the street sewer level. B is a collector from the waste pipes of the floor strainers I I, etc., and the drip-sinks. C is the emptying pipe from the distribution drums, and D is the emptying pipe from the tank C, Fig. 2. E is an aspirator to which steam can be admitted through the valve F to produce suction and draw the contents of the tank A out through pipe G, which discharges through a branch K to the house drain L that empties into the street sewer. H is a vent pipe to maintain atmospheric pressure in the tank A.
PLUMBING IN THE UNION TRUST COMPANY's BUILDING, NEW YORK CITY.