Sizing Plumbing Water System
A. Bhatia, B.E.
Plumbing water distribution systems are designed on the idea of the most probable peak demand loading, which reflects the worst-case scenario for a system. These types of systems require different considerations than large-scale water distribution networks. The difference is primarily attributed to uncertainty regarding the use of plumbing fixtures, hence uncertainty in demand loadings.
This 3-hour course provides comprehensive design methodology and underlying principles of plumbing water systems. This course addresses the design criteria for estimating potable water demand for residential and transitory use facilities.
This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.
At the conclusion of this course, the student will:
This course is aimed at students, architects, mechanical engineers, civil engineers, facility designers, health and environment professionals, energy auditors and anyone who wants a basic understanding of plumbing systems.
Benefit to Attendees
This course will help professional engineers and designers gaining a basic understanding of plumbing systems and help conceptualizing design in the absence of any more appropriate information.
In today's buildings, all occupancies must be provided with a supply of potable or drinkable water that has enough volume and pressure to make it easily available.
Design of plumbing water system primarily requires estimating the water demand and selecting equipments associated with potable water system.
Supply plumbing includes all piping and related components from the water source to the fixtures.
The course is divided into four parts as follows:
The course content is contained in the following PDF file:
Sizing Plumbing Water System
Please click on the above underlined hypertext to view, download or print the document for your study. Because of the large file size, we recommend that you first save the file to your computer by right clicking the mouse and choosing "Save Target As ...", and then open the file in Adobe Acrobat Reader. If you still experience any difficulty in downloading or opening this file, you may need to close some applications or reboot your computer to free up some memory.
The course presents the basic understanding of the fundamental concepts of plumbing water system. The model codes such as UPC, SPC, and IPC provide a simplified basis of estimating the potable water demand based on the number of plumbing fixtures.
The estimation of potable water demand is based on the probability theory that has been worked out to predict the mind-set or socioeconomic ethics of the consumers on water use. The fundamental piping design parameter, fixture unit count, is a rough (probable) estimate based on continuous vs. intermittent water demands in a great variety of occupancies, which is then used to estimate supply delivery rates, pipe diameters, and component capacities. The estimation of ‘non-residential’ water demand is based on the historical data published by American Water Works Association.
The recommended sizing of piping system is based on the pressure drop-velocity criteria. A standard engineering practice for pipe sizing is based on restricting pressure drop to 5 psi per 100 ft equivalent length simultaneous with velocity not exceeding 8 fps. The various other plumbing items such as pumps and storage tank selection should be based on the peak demand and maximum average day demand respectively.
Water is available in abundance and therefore a little attention is paid to conserve the water. One tends to forget that there are costs associated with treating water and any wastage has direct impact on the energy and environment. Potable water systems are also disinfected to make it suitable for drinking. The regulating agencies are putting more and more emphasis on conserving water and in some states even enforcing restrictive covenants on the use of water. A 2-hour course titled "Water Conservation Tips" provide a glance to conservation practices.
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.