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Environmental Controls I/IG

Environmental Controls I/IG. Lecture 8 Waste & Vent Systems Waste & Vent Sizing Procedure Bathroom Design. Waste & Vent Systems. Fundamentals. Siphon action can drain water Trap blocks sewer gas Vent breaks siphon. S: p. 988, F.22.8. Air Gaps.

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Environmental Controls I/IG

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  1. Environmental Controls I/IG Lecture 8 Waste & Vent Systems Waste & Vent Sizing Procedure Bathroom Design

  2. Waste & Vent Systems

  3. Fundamentals Siphon action can drain water Trap blocks sewer gas Vent breaks siphon S: p. 988, F.22.8

  4. Air Gaps Eliminate the potential for cross contamination S: p. 991, F.22.11

  5. Vents and Stacks Note: Drain fittings are 45º Individual vents Circuit vents Soil stack Vent stack Stack vent “Wet stack” Vent through roof (VTR) S: p. 990, F.22.10

  6. Drains & Sewers Note: Drain fittings are 45º House drain House sewer Storm drain Clean outs House traps Fresh air inlet S: p. 989, F.22.9

  7. Waste & Vent Sizing Procedure

  8. 1. Identify waste & soil locations Clusters are more efficient S: p. 995, F.22.17

  9. 2. Layout system vertically & horizontally Grouped fixtures can be stacked in a vertical riser S: p. 1009, F.22.31

  10. 3. Size Traps Trap size is used when connecting to main S: p. 998, T.22.2

  11. 4. Calculate Drainage Fixture Units (DFU) Pipe sizes based on DFU S: p. 998, T.22.2

  12. 5. Determine loads Fixture location may control size S: p. 1003, F.22.24

  13. 6. Determine slope and size of horizontal drains Slope may be constrained by depth of floor cavity S: p. 1001, T.22.5

  14. 7. Verify maximum vent length Measured from plans S: p. 1003, F.22.24

  15. 8. Size vents according to DFU and length Calculate for each vent load and developed length S: p. 1000, T.22.4

  16. 9. Verify space requirements and adjust design Common adjustments • “Wet” walls  6” cavity • Slope and ceiling exposure • Cleanout access

  17. Bathroom Design

  18. Design Considerations ADA compliance • ANSI Standard A117.1 1986 • Wheel chair access • Grab bars • Counter top/fixture heights Visual privacy Acoustical privacy

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