Individuals can explain how to calculate drainage fixture units for waste systems. They understand how to size drain, waste and vent (DWV) systems, storm drainage systems, and roof storage and drainage systems. They are able to size waste stacks, building drains and sewers, vents, branch lines for plumbing fixtures and conventional roof drainage systems. They are able to identify types of roof drainage systems. They can explain how to size above-grade and below-grade drainage systems.

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