Advantage • • • • • • •
Free from odour and flies Breeding of mosquitoes can be controlled Minimum consumption of water and so can function even in less permeable sails Easy to construct Easy to maintenance Most suitable where and cleaning is by soft/hard materials Suitable in impervious soils and rocky strata
Disadvantage • • • • •
Do’s • • •
• •
Minimum water to be used Keep the interiors of superstructure dark to prevent flies Check that wire mesh on vent pipe is of proper size openings clean the wire mesh periodical to clear blockage of openings, if any Keep the floor clean Throw small quantity of wood ash or soil after every use.
Unsuitable where cleaning of anals is by water. Cleaning of pit is to be done manually Superstructure needs to be removed when pit is filled up. If proper vent and mosquito trap are not provided, flies and mosquitoes breed. Difficulty in proper cleaning of floor due to restricted use of water.
Don’ts • • • • •
Do not keep the door open Do not leave any openings from pit or squatting platform (except squat hole) Do not leave the roof uncovered Do not leave the pit unlined if soil is collapsible Do not empty pit manually, particularly when excreta is fresh, to avoid health risk to emptier.