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3c. Water System. Chapter 8; Appendix B (Wentz) and 8.1-  8.3 (Toa). 4.11 Analysis and Design of Construction Systems - Mechanical (6 hrs). Water Sizing. Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman. Steps to sizing. Isometric Diagram. 30 o. Assign WSFU.

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water sizing

3c

Water System

Chapter 8; Appendix B (Wentz) and 8.1-  8.3 (Toa)

4.11 Analysis and Design of Construction Systems - Mechanical (6 hrs)

Water Sizing

Plumbing Systems

CNST 305

Environmental Systems 1

Dr. Berryman

assign wsfu
Assign WSFU

2 WSFU x .75 = 1.5

5 WSFU

10 WSFU

1 ¼” spud

  • Water Supply Fixture Unit (WSFU)
  • Use Table 2-2 (Wentz) for WSFU assignment…pp 7-12
    • See note 3 (fine print on bottom)
add up all wsfu
Add Up All WSFU

110 WSFU

21 WSFU

3 WSFU

1.5 WSFU

1.5 WSFU

8 WSFU

3 WSFU

1.5 WSFU

1.5 WSFU

13 WSFU

5 WSFU

23 WSFU

5 WSFU

33 WSFU

10 WSFU

143 WSFU

24 WSFU

10 WSFU

convert to gpm

70 GPM

14.6 GPM

5 GPM

5 GPM

3.5 GPM for each

10 GPM

29.4 GPM

7 GPM

36.8 GPM

7 GPM

42.7 GPM

Hunter Curves

Predominantly Flushometer

Predominantly Flush Tank

16.4 GPM

27 GPM

78.3 GPM

27 GPM

Convert to GPM
select chart and size

½”

½”

½”

½”

¾”

¾”

1”

1”

Select Chart and Size

1 ¼” spud

  • Note:
  • Use copper pipe
  • Use minimum size from tbl 2.2 for individual fixture pipe
predominantly flushometers for smooth copper pipe

78.3 gpm

70 gpm

42.7 gpm

36.8 gpm

29.4 gpm

10 gpm

5 gpm

Predominantly Flushometers for Smooth Copper Pipe

2 ½”

2”

2”

1½”

1½”

1”

¾”

  • Notes:
  • 5-10 fps
  • 2-7 psi/100’
class exercise
Class Exercise
  • You size the hot water piping
  • Does the hot water side use flushometers?
  • Use predominately flush tanks
check

2”

1”

½”

½”

½”

¾”

¾”

½”

1”

¾”

1 ½”

¾”

1 ½”

2”

1”

1 ¼”

1”

2 ½”

Check
  • 5-10 fps
  • 2-7 psi/100’
  • Pressure at last fixture
notable notes
Notable notes:
  • Booster pumps
    • Need for boost water pressure to overcome static head and friction
    • Sizing
      • (A) Available water pressure
      • (B) Pressure required at last fixture
      • (C) Static head losses
      • (D) Friction losses
        • Equivalent length
        • Pressure drop through backflow preventors, meter, water softeners, and filters
    • A – (B+C+D) = required boost
next time

4abc

Drain, Waste, Vent

Chapter 2,5,6 Appendix C (Wentz) and  8.4 - 8.5 (Toa)   

Next Time
  • Assignment #1
    • Due Monday beginning of class
      • Problem 9 in Chapter 8 of Wentz, pp. 132
  • Drain Waste Vents (DWV)