other plumbing fixture. Under these conditions the refrigerator is not only protected by two traps, but there are two breaks be Main Wasia Yeni Vent FIG. 190.-Connections for Kitchen FIG. 191.-Wrong Connections for tween the drainage system and the refrigerator, one between the two traps, and another between the refrigerator and its drip pan. It is advisable to have the refrigerator trap drip into the sink FIG. 192. Proper Refrigerator Connections. in the manner shown, rather than to have the openings of the two traps in line with each other vertically. With these connections and intelligent use and precaution, there should be no reason why the refrigerator should not waste into the drainage system with as much safety as any other fixture. The foregoing gives an idea of the details of connections for the different fixtures commonly found in residences. In Fig. 193 is shown an elevation of the complete plumbing system for a residence, after the roughing has been completed, and the work is ready to receive the water test. This system is constructed according to the practice which is generally followed in most sections of the country. It is capable of improvement, however, by the application of continuous venting in place of the crown venting shown. The same system after it has reached completion, with all fixtures in position, is seen in Fig. 194. CHAPTER XIX PLUMBING FOR SCHOOLS, HOTELS, FACTORIES, STABLES, ETC. THE plumbing systems for schools, factories, etc., and for such buildings as apartments, are very much more complex than those for residences and small dwelling houses, and call for the solution of problems of a considerably different nature. In this larger work, especially in the toilet rooms of schools, hotels, and various other public buildings, long lines of fixtures must be provided for, and upon such work much judgment and skill may be displayed. This is true, for instance, in the connections for lines of lavatories. The old method of performing this work was according FIG. 195.-Poor Method of Connecting Line of Lavatories into One Trap. to Fig. 195, in which a single trap is made to serve the entire line. This is obviously a poor method. Whenever the trap stops up, as it is almost sure to do sooner or later, not one only, but the entire number of lavatories is rendered useless, until the stoppage is removed. Another objectionable feature is the fact that foul waste pipe running the entire length of the line of lavatories is constantly throwing its impure |