d. Urinoil. The urinoil (figure 6-13) represents a further modification for the
more permanent installation. Simply described, it is a 55-gallon drum placed over a
recessed soakage pit to receive and trap urine. The drum contains a quantity of waste
oil, thus the name, urinoil. Urine voided through the screen and onto the surface of the
oil immediately sinks through the oil to the bottom of the drum. The action of the urinoil
is somewhat like that of a barometer. As more urine is added, the level rises within the
3-inch diameter pipe until it reaches the level of the notches in the 1-1/2 inch diameter
overflow pipe in the center of the drum. The atmospheric pressure together with the
weight of the oil causes the urine to overflow until an equilibrium is reestablished within
the drum. The oil acts as an effective seal against odors and against the entrance of
flies. The screen is easily lifted with attached hooks for removal of debris. The urinoil is
operative in place as long as the soakage pit will accept the urine.
Figure 6-13. Urinoil.
6-16. OPERATION OF URINE DISPOSAL FACILITIES
In order to ensure the proper operation of these latrine facilities, the following
procedures should be observed.
a. Use the trough or the pipes--do not urinate on the surface of the pit.
b. Wash funnels or trough daily with soap and water.