The sanitary arrangements of well-appointed factories of the present day are of as high an excellence as for schools and other institutions. There is no reason why they should not be of a high standard, but it is true that, until within a comparatively few years, they have often been given scant attention.

The ventilation of the toilet room should be on the same scale and as thorough as that of other public toilet rooms. In Fig. B is shown a floor plan of part of a factory toilet room.

Factory Plumbing.

Factory Plumbing 101

Fig. B.

Factory Plumbing 102

Fig C.

Local Vent

Factory Plumbing 103


As will be seen, it is thoroughly lighted from outside windows and also by inside windows, the latter admitting light from the outside to the wash room. The floor should be constructed of waterproofed concrete, and provided with a floor drain, as the thorough flushing out of such rooms is very essential.

A sill cock, conveniently located, will be found convenient in supplying water for this purpose.

In Fig. D is shown the common method of venting such a line of water closets and the connection of the main horizontal vent line into the main vent stack. The use of the circuit-vent system, as shown in Plate 29, is advantageous in such work, and results in reducing the cost of installation.

In buildings of factory construction, horizontal waste and soil lines may be run on the ceiling of the floor below, thus making such lines, with their cleanouts, accessible from the floor below. It may be stated that, in using the circuit and loop vents, it is desirable to run the horizontal soil line as close to the bases of the water closets as possible. The line of water closets shown is provided with local vents. Ventilation by means of fresh and foul-air flues and fans, as described in Plate 37, is preferable for large toilet rooms to the system shown in Fig. D, as it is more thorough, purifying the air of the entire room more effectually. The wash sink for factory use is an important matter.

In Fig. B a double line of wash sinks is shown, and in Fig. C an end view of the same. The sinks shown are of enameled cast iron, cast in sections, thus allowing any length of sink to be used. They are supported on cast-iron standards, and made in a variety of forms. The waste may be arranged as in Fig. C, which shows a short waste connection above the floor, leading into a trap which serves both lines, the horizontal waste being of cast or wrought iron and hung on the ceiling below. In factory and school plumbing systems it is well to have as little piping exposed as possible, owing to the rough and careless usage given it.

The size of the waste from the factory sink should not be less than 2 in., and 3 in. for sinks of great length. The trap should be vented with 2-in. cast- or wrought-iron pipe, which is carried vertically to the ceiling, and then horizontally into the nearest vent stack.