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.
Figure 22 is a diagram of the gentlemen's toilet and bath rooms on the fourth floor, and is one of a series of six similar ones, directly above one another. A is the main corridor; B, an entrance to hall; C, a pipe and ventilation shaft, and W, a window; D D are Figure 23 is a perspective view of pipe connections in shaft C, Fig. 22, and the same pipes are designated by the same reference letters as in that Figure. Q is a 2-inch cast-iron vent pipe to three washbasins and one bathtub; R is a 2-inch cast-iron vent pipe to two water-closets; S is a ¾ inch hot-water supply to four washbasins and two bathtubs; T is a 1-inch cold-water supply to all the fixtures shown in Fig. 22; U is a 1 inch waste pipe from all the lead safes under the fixtures; V is a 3-inch soil pipe from one water-closet; and W is 4-inch soil pipe from one water-closet, four washbasins, two bathtubs, and one slopsink.
Figure 24 is a diagram of the arrangement of a toilet-room, designed to serve two suites of guest rooms, which communicate with it by doors D D. There is a set of six of these rooms in the same vertical line, on the successive guest floors, in the front of the house, and the same in the rear.
A is a washbasin; B, a porcelain bathtub; C, a water-closet; E, a ventilation, light and pipe shaft; and L, a 3-inch local vent pipe; F, G, H, I, J, and K are riser lines, designated by the same reference letters as in Fig. 25, which is a diagram of their branches to the toilet-room connections. F is a 2-inch safe waste with 1-inch branches D and W. to the water-closet and the bathtub respectively; G is a 4-inch trap vent, with 2-inch branches N, O, and T to the washbasin, water closet and bathtub; H is the 6 inch soil pipe, with 3-inch branch S to water-closet and washbasin, and 2-inch branch X to the bathtub; I is a 2-inch cold-water supply, with ¾-inch branches M, R, and V to the water-closet, cistern, the washbasin and bathtub; J is the hot-water supply with ¾-inch branches O to the washbasin, and U is the bathtub; K is the 1½-inch hot-water return circulation pipe. In Fig. 24 none of the horizontal branches is shown except for the soil pipe, which is made solid black.
Figure 26 shows the arrangement of one of a set of six double toilet-rooms, which are in the same vertical line and communicate, through doors D D, with special suites of guest chambers on the successive guest floors of the house.
A A are bathtubs; B B are washbasins; and C C, water-closets; E is the light, ventilation and pipe shaft, about 42x36 inches square, and F. G, H, I, J, and K are the riser lines which correspond to those designated by the same reference letters in Fig. 27. The latter shows their connections for the branches serving this floor.
The soil-pipe branches N N, to the bathtubs, only, are shown by solid black lines.
F is a 5-inch soil pipe, with 4-inch branches L L to the water-closets, 2-inch branches M M to the washbasin, and 2 inch branches N N to the bathtubs; Z Z are cleaning-out screens; G is the 4 inch trap vent pipe with 2-inch branches, O to one bathtub and washbasin, P to one bathtub, Q to one basin, and R R to one water-closet each; HisaiJ^-inch safe waste pipe with 1-inch branches S S, to one water-closet safe each, and T to two bathtub safes.
I is the 1½-inch cold water supply, with 1½ -inch branches U U, to the bathtubs, ½-inch branches V V to the washbasins, and ¾-inch branches W W to the water-closet cisterns, in the toilet-room next below the one shown in Fig. 26; J is the 1¼-inch hot-water supply, with 1-inch branches X X to the bathtubs, and ½-inch branches Y Y to the washbasins; K is the 1½-inch hot-water return circulation pipe.
The private toilet-rooms attached to the guest suites are all paved with mosaic tiles, have marble paneling, porcelain bathtubs, and polished natural wood cabinetwork. All pipes are exposed and nickel-plated. Throughout the house all pipes are exposed, access:-ble; and all waste and soil pipes are provided with numerous scrub holes for cleaning. The pipes are of extra heavy cast iron, and were tested by water pressure after the joints were calked.
Special care was taken in arranging the trap vent pipes to carry the horizontal branches always well above the fixtures so as to prevent possibility of their acting as an overflow.
There are in the house a total of about 200 water-closets, 200 washbasins, 150 bathtubs, 20 slopsinks, 20 iron sinks, and 15 urinals Jeremiah Delaney was the foreman plumber in charge of the work.