Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Drains and Sewers - Capacities vs. Size

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

Drains and sewers - capacity vs. slope and fixture units

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.

Related Documents

Cast Iron Soil Pipes - Dimensions

Dimensions of cast iron soil pipes.

Cleanouts in Draining Systems

Cleanouts provides access to the sewer for rodding.

DFU - Drainage Fixture Units

DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems.

Drain Pipes and Vent Stacks

Drain pipes and vent stack sizing.

Draining Systems - Main Vents

Vents in draining systems protects traps against pressure differences that could cause them to siphon or blow out .

Fixtures Trap Sizes

Recommended drain trap sizes for different types of fixtures

Horizontal Drainage Pipe - Required Slopes

Minimum pitch of horizontal drainage pipes.

Sanitary Drainage Systems - Volume Flow

Calculate expected volume flow load in sanitary drainage systems.

Sanitary Piping - Drainage Fixtures Unit Loads

Maximum Drainage Fixture Unit - DFU - loads in sanitary piping systems.

Septic Systems

Septic systems handles waste from drain systems.

Sewer Pipes - Capacities vs. Slope

Carrying capacities of sewer and wastewater pipes - gpm and liter per second.

Trap Sizes vs. Fixture Units

No. of fixture units and required trap size.

Water Supply Fixture Units - WSFU vs. GPM and Liters/sec

Converting WSFU - Water Supply Fixture Units - to GPM.

Water Supply Fixture Units WSFU

WSFU is used to calculate water supply service systems.