Draining Systems - Main Vents
Vents in draining systems protects traps against pressure differences that could cause them to siphon or blow out .
Vents protects traps against pressure differences that could cause them to siphon or blow out, leaving occupants unprotected against smell and potential contaminants from the sewer system.
| Pipe Size (in) | Max. Drainage Fixture Units (DFU) |
|---|---|
| 1 1/4 | 1 |
| 1 /1/2 | 81) |
| 2 | 24 |
| 2 1/2 | 48 |
| 3 | 84 |
| 4 | 256 |
1) No water closets permitted
- at least one vent should terminate through the roof
- air admittance valves within the building may be permitted (check local authority)
- terminating vents in side wall may be permitted (check local authority)
Related Topics
-
Dimensions of Pipes and Tubes
Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.
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. -
Drains and Sewers - Capacities vs. Size
Drainage Fixture Units (DFU) connected to building drains and sewers. -
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. -
Trap Sizes vs. Fixture Units
No. of fixture units and required trap size. -
Waste Water Piping - Flow Capacitiy vs. Dimension
In sewage piping and pumping systems the fluid flow rate must be kept within certain limits to avoid operating problems. -
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.
