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Effective Waste and Vent System Design for Optimal Bathroom Plumbing Solutions

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This lecture focuses on the critical aspects of waste and vent systems in bathroom design, outlining the essential procedures for sizing and layout. Key topics include understanding siphon action to prevent sewage odor, the importance of air gaps to avoid cross-contamination, and efficient configuration of drainage fixtures. You will learn how to identify waste and soil locations, determine the slope and size of drains, and verify vent sizes according to Drainage Fixture Units (DFU). Additionally, the lecture covers ADA compliance and other design considerations for modern bathrooms, ensuring functionality and accessibility.

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Effective Waste and Vent System Design for Optimal Bathroom Plumbing Solutions

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Presentation Transcript

  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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