Technology in ArchitectureTechnology in ArchitectureTechnology in ArchitectureTechnology in Architecture

Lecture 15

Waste & Vent SystemsWaste & Vent Sizing Procedure

Bathroom Design

Lecture 15

Waste & Vent SystemsWaste & Vent Sizing Procedure

Bathroom Design

Waste & Vent SystemsWaste & Vent SystemsWaste & Vent SystemsWaste & Vent Systems

FundamentalsFundamentals

Siphon action can drain water

Trap blocks sewer gas

Vent breaks siphon

S: p. 1006, F.22.8

Air GapsAir Gaps

Eliminate the potential for cross contamination

S: p. 1009, F.22.11

Vents and StacksVents and Stacks

Individual ventsCircuit ventsSoil stackVent stackStack vent

“Wet stack”

Vent through roof (VTR)

S: p. 1008, F.22.10

Note: Drain fittings are 45º

Drains & SewersDrains & Sewers

House drainHouse sewerStorm drain

Clean outsHouse trapsFresh air inlet

S: p. 1007, F.22.9

Note: Drain fittings are 45º

Waste & Vent Sizing Waste & Vent Sizing ProcedureProcedureWaste & Vent Sizing Waste & Vent Sizing ProcedureProcedure

1. Identify waste & soil locations1. Identify waste & soil locations

Clusters are more efficient

S: p. 1014, F.22.17

2. Layout system 2. Layout system vertically & horizontallyvertically & horizontally

Grouped fixtures can be stacked in a vertical riser

S: p. 1027, F.22.31

3. Size Traps3. Size Traps

Trap size is usedwhen connectingto main

S: p. 1017, T.22.2

4. Calculate 4. Calculate Drainage Fixture Drainage Fixture Units (DFU) Units (DFU)

Pipe sizes based on DFU

S: p. 1017, T.22.2.2

5. Determine loads5. Determine loads

Fixture location may control size

S: p. 1022, F.22.24

6. Determine slope and size of 6. Determine slope and size of horizontal drains horizontal drains

Slope may be constrained by depth of floor cavity

S: p. 1020, T.22.5

7. Verify maximum vent length7. Verify maximum vent length

Measured from plans

S: p. 1022, F.22.24

8. Size vents according to 8. Size vents according to DFU and length DFU and length

Calculate for each vent load and developed length

S: p. 1019, T.22.4

9. Verify space requirements 9. Verify space requirements and adjust designand adjust design

Common adjustments “Wet” walls 6” cavity Slope and ceiling exposure Cleanout access

Bathroom DesignBathroom DesignBathroom DesignBathroom Design

Design ConsiderationsDesign Considerations

ADA compliance ANSI Standard A117.1 1986 Wheel chair access Grab bars Counter top/fixture heights

Visual privacyAcoustical privacy