Figure 5-32. - Wall-mounted drinking fountain.

Figure 5-31. - Cutaway view of a shower pan drain.

connecting, the shower pan is connected to a P trap following the manufacturer's instructions that accompany the shower pan.

DRINKING FOUNTAINS

All types of drinking fountains should be installed with the orifice located from 30 to 40 inches above the floor, depending upon the general height of the users. One type of wall-hung drinking fountain is shown in figure 5-32. The mounting of the fixture should be sturdy and strong enough to hold more weight than that of the fixture itself. Most drinking fountains must be installed with a 1 1/4-inch P trap underneath the waste, but a few are available with integral traps. The electrically cooled drinking fountain requires an electrical outlet nearby for power. Because of the many variations in style of drinking fountains, the manufacturer's installation procedures and specifica- tions should be followed in each case.

FLOOR DRAINS

Floor drains are used to carry contaminated water to the sanitary or storm sewer. Sanitary sewage very rarely passes through a floor drain, unless other fixtures in a system overflow and sewage backs up into the floor drains.

Floor drains are divided up into two groups: those that are designed with a water seal and those that are not. Floor drains, used in connection with a sanitary sewer, by code, must have a water seal (fig. 5-33,

Figure 5-33. - Integral trap with ball check valve.