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close this bookA Guide to the Development of on-site Sanitation (WHO; 1992; 246 pages)
View the documentPreface
close this folderPart I. Foundations of sanitary practice
open this folder and view contentsChapter 1. The need for on-site sanitation
open this folder and view contentsChapter 2. Sanitation and disease transmission
open this folder and view contentsChapter 3. Social and cultural considerations
close this folderChapter 4. Technical options
View the documentOpen defecation
View the documentShallow pit
View the documentSimple pit latrine
View the documentBorehole latrine
View the documentVentilated pit latrine
View the documentPour-flush latrine
View the documentSingle or double pit
View the documentComposting latrine
View the documentSeptic tank
View the documentAqua-privy
View the documentRemoval systems for excreta
open this folder and view contentsPart II. Detailed design, construction, operation and maintenance
open this folder and view contentsPart III. Planning and development of on-site sanitation projects
View the documentReferences
View the documentSelected further reading
View the documentGlossary of terms used in this book
View the documentAnnex 1. Reuse of excreta
View the documentAnnex 2. Sullage
View the documentAnnex 3. Reviewers
View the documentSelected WHO publications of related interest
View the documentBack Cover

Pour-flush latrine

A latrine may be fitted with a trap providing a water seal, which is cleared of faeces by pouring in sufficient quantities of water to wash the solids into the pit and replenish the water seal. A water seal prevents flies, mosquitos and odours reaching the latrine from the pit. The pit may be offset from the latrine by providing a short length of pipe or covered channel from the pan to the pit. The pan of an offset pour-flush latrine is supported by the ground and the latrine may be within or attached to a house.



Low cost

A reliable (even if limited) water supply must be available

Control of flies and mosquitos

Unsuitable where solid anal cleaning material is used

Absence of smell in latrine


Contents of pit not visible


Gives users the convenience of a WC


Can be upgraded by connection to sewer when sewerage becomes available


Offset type


Pan supported by ground


Latrine can be in house

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