Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman Water Sizing Plumbing Systems CNST 305 Environmental Systems 1 Dr. Berryman 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)

Steps to sizing

Isometric Diagram 30o

Assign WSFU Water Supply Fixture Unit (WSFU) 2 WSFU x .75 = 1.5 5 WSFU Assign 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 110 WSFU 21 WSFU 3 WSFU 1.5 WSFU 1.5 WSFU 8 WSFU

Convert to GPM Hunter Curves Predominantly Flushometer Predominantly Flush Tank Convert to 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 5 GPM 14.6 GPM 16.4 GPM

Select Chart and Size ½” ¾” Note: Use copper pipe 1” 1 ¼” spud Note: Use copper pipe Use minimum size from tbl 2.2 for individual fixture pipe

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

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

Check 5-10 fps 2-7 psi/100’ Pressure at last fixture 1” ½” ¾” 1 ½” 2” 1 ¼” ¾” 1” 1 ½” 2” 2 ½” ½”

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

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) 4abc Drain, Waste, Vent Chapter 2,5,6 Appendix C (Wentz) and  8.4 - 8.5 (Toa)