Pipe Sizing Continued from page 43
as well as many documents, old and current, from CIB (International Council for Building Research). CIB W-62 (the CIB Commission on Water Supply and Drainage) was specifically organized to address the need for an improved computational procedure for the design and evaluation of water service and distribution systems in buildings. This is
now the leading international think tank on this question. At the CIB W-62 36th international symposium, held in
Sydney, Australia, in November 2010, Pete DeMarco of IAPMO, representing the United States, presented a paper co-authored by Larry Galowin and me titled, “Hunter Fixture Unit Probability/Uncertainty.” This paper introduced the improved computational methods initiated by IAPMO, and it gave preview of what may be coming, displaying the tentative revised curves, fixture performance table, a com- parison chart with the original Hunter’s Curve and plotted data points from field data that fall closely within the range of the revised curve. DeMarco reported that the paper was well received. The tenacious teamwork of IAPMO, partnering with
industry experts who volunteer their time and effort, shows the world at large that the plumbing industry is alive and well and is committed to the health of the world in its green effort to conserve for all future generations. Dr. Hunter would truly be proud of IAPMO and its partners, as they are indebted to him. n
Daniel P. Cole is the technical services supervisor for
Computer program preliminary calculated indications show reduced water demand flow rates from predictive curves. Data source information from field measurements illus- trates impacts from reduced water consumption with ener- gy/water efficient appliances and fixtures.
IAPMO. He is a licensed journeyman plumber in the state of Illinois and has had more than 20 years’ experience in the design and installation of plumbing systems as a journey- man plumber and as a plumbing contractor. In addition, he is a member of the American Society of Plumbing Engineers and the Illinois Plumbing Inspector’s Association. He can be reached at
dan.cole@
iapmo.org.
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Page 44/Plumbing Engineer
March 2011
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