Most impoant pre-requisite in sanitary latrine is :
Water seal Water seal: The most impoant pa in a sanitary latrine is the water seal. The water seal is the distance between the level of water in the trap & the lowest point in the concave upper surface of the trap It has two impoant functions It prevents access by flies It prevents escapes of odors & foul gases The depth of water seal in the RCA latrine is 2 cm
Squatting plate or slab
Water seal
Smooth slope of pan
Adequate drainage