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Water Sizing Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman 3cWater SystemChapter 8; Appendix B (Wentz) and 8.1- 8.3 (Toa) 4.11 Analysis.

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Presentation on theme: "Water Sizing Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman 3cWater SystemChapter 8; Appendix B (Wentz) and 8.1- 8.3 (Toa) 4.11 Analysis."— Presentation transcript:

1 Water Sizing Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman 3cWater SystemChapter 8; Appendix B (Wentz) and (Toa) 4.11 Analysis and Design of Construction Systems - Mechanical (6 hrs)

2 Steps to sizing

3 Isometric Diagram 30 o

4 Assign WSFU Water Supply Fixture Unit (WSFU) Use Table 2-2 (Wentz) for WSFU assignment…pp 7-12 See note 3 (fine print on bottom) 2 WSFU x.75 = WSFU 10 WSFU 1 ¼ spud

5 Add Up All WSFU 1.5 WSFU 5 WSFU 10 WSFU 3 WSFU 8 WSFU 13 WSFU 23 WSFU 33 WSFU 3 WSFU 21 WSFU 110 WSFU 24 WSFU 143 WSFU

6 Convert to GPM 5 GPM 14.6 GPM 16.4 GPM 5 GPM 3.5 GPM for each 10 GPM 29.4 GPM 36.8 GPM 42.7 GPM 78.3 GPM 70 GPM 7 GPM 27 GPM Hunter Curves Predominantly Flushometer Predominantly Flush Tank

7 Select Chart and Size Note: Use copper pipe Use minimum size from tbl 2.2 for individual fixture pipe ½ ½ ½ ½ ¾ ¾ ¼ spud

8 Predominantly Flushometers for Smooth Copper Pipe 5 gpm 10 gpm 42.7 gpm 29.4 gpm 36.8 gpm 70 gpm 78.3 gpm Notes: 5-10 fps 2-7 psi/100 ¾ 1 1½ ½

9 Class Exercise You size the hot water piping Does the hot water side use flushometers? Use predominately flush tanks

10 Check 1 ¼ ¾ 1 ¾ 1 1 ½ 2 2 ½ 2 ½ ½ ½ ½ ¾ ¾ fps 2-7 psi/100 Pressure at last fixture

11 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

12 Next Time Assignment #1 Due Monday beginning of class Problem 9 in Chapter 8 of Wentz, pp. 132 Drain Waste Vents (DWV) 4abcDrain, Waste, VentChapter 2,5,6 Appendix C (Wentz) and (Toa)


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