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Drains and Sewers

Drainage Fixture Units (DFU) connected to building drains and sewers

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Note! - charts are based on clean pipes. Friction coefficients may vary with pipe material.

The Drainage Fixture Unit Values (DFU) are defined by the Uniform Plumbing Code (UPC) and can be used to determine required drainage capacities from fixtures and service systems.

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Related Topics

Sanitary Drainage Systems - The purpose of a sanitary drainage system is to remove effluent discharged from plumbing fixtures and other equipment

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Drainage Fixture Unit Values - DFU - DFU are used to determine the drainage from fixtures and required capacity of sewer service systems
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Fixture Units - WSFU vs GPM and Liters/sec - Converting WSFU - Water Supply Fixture Units - to GPM
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Slope of Horizontal Drainage Pipe - Minimum pitch of drainage pipes
Volume Flow in Sanitary Drainage Systems - Calculate expected load in sanitary drainage systems
Water Supply - Fixture Units WSFU - WSFU is used to calculate water supply service systems

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