Building subdrain


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Terms & Synonyms

Official WHO Definition

A building sub drain is a portion of a building drain which cannot drain by gravity to the normal building drainage system. (American Society of Sanitary Engineering 2007)That portion of a drainage system that does not drain by gravity into the building sewer (WHO 2006). 

Other Definitions


Interpretations and Explanations

A building sub drain is constructed using the normal drainage gravity and plumbing venting principles. The sub drain which is below the inlet levels of the accepting gravity sewer or drain, is discharge to a pump system where the sewage or waste water is elevated to a point where gravity discharge can be achieved (World Plumbing Council Working Group 2008).


American Society of Sanitary Engineering (2007). Plumbing Dictionary. Sixth Edition.  WHO (2006) Health aspects of plumbing

WHO Lexicon page (translations and examples)

See also

External Resources


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