The Plumbing Efficiency Research Coalition is set to begin its long-anticipated Drainline Transport in Buildings study. The effort is aimed at determining if decreasing levels of water flow––caused by increasingly efficient plumbing fixtures––are sufficient to clear debris from plumbing pipes.
Essentially, plumbing experts have expressed concerns that the industry has reached a tipping point in terms of the ability of low-flow fixtures to adequately transport waste through drain lines, particularly in larger commercial systems with long horizontal runs to the sewer. Soon, they worry, end-users and professionals will avoid using more efficient products.
That, combined with the fact that such problems have been reported with low-flow plumbing systems in Europe and Australia, has raised many questions.
“I look forward to the results of the Drainline Transport study,” says David C. Smith, PE, plumbing and fire protection department manager, Bala Consulting Engineers, King of Prussia, Pa. “Logic states that less water in the waste stream will not carry the waste as far in the drainage piping.”
By analyzing the drainage issue from a standpoint of slope, flush volume, toilet design, and whether periodic surges of water into a building drain can help, researchers hope to come away with a more informed understanding of the issue.
David E. DeBord, CPD, LEED BD+C, ARCSA-AP, a Chicago-based plumbing and fire protection engineer, wonders if ultimately the industry will need to reduce the size of piping to maintain the minimum velocities required to assure proper scouring, and whether a 1/8-inch minimum pitch per foot of piping is still sufficient in this new world of low-flow plumbing systems.
PERC’s coalition members include the International Association of Plumbing & Mechanical Officials (IAPMO), Alliance for Water Efficiency (AWE), the American Society of Plumbing Engineers (ASPE), the International Code Council (ICC), Plumbing-Heating-Cooling Contractors (PHCC), and Plumbing Manufacturers International (PMI). The group’s impending research is scheduled to be conducted at an American Standard testing facility. +
Related Stories
| May 20, 2013
4 emerging trends in parking structure design
Survey of parking professionals reveals how technology is transforming the parking industry.
| May 20, 2013
Jones Lang LaSalle: All U.S. real estate sectors to post gains in 2013—even retail
With healthier job growth numbers and construction volumes at near-historic lows, real estate experts at Jones Lang LaSalle see a rosy year for U.S. commercial construction.
| May 17, 2013
First look: HKS' multipurpose stadium for Minnesota Vikings
The Minnesota Sports Facilities Authority (MSFA), the Minnesota Vikings and HKS Sports & Entertainment Group have unveiled the design of the State’s new multi? purpose stadium in Minneapolis, a major milestone in getting the $975 million stadium built on time and on budget.
| May 17, 2013
40 Under 40 winners: Meet the architects
Of the up-and-coming AEC professionals to be named 40 Under 40 winners by the editors of Building Design+Construction, 18 make their living in the architecture profession.
| May 17, 2013
5 things AEC pros need to know about low-e glass
Low-emissivity glasses are critical to making today’s buildings brighter, more energy-efficient, and more sustainable. Here are five tips to help AEC professionals understand the differences among low-e glasses and their impact on building performance.
| May 17, 2013
University labs double as K-12 learning environments
Increasingly, college and university research buildings are doing double duty as homes for K-12 STEM programs. Here’s how to create facilities that captivate budding scientists while keeping faculty happy.
| May 17, 2013
LEED v4 has provision to reduce water use in cooling towers
The next version of the U.S. Green Building Council's LEED rating system will expand water-savings targets to appliances, cooling towers, commercial kitchen equipment, and other areas.
| May 16, 2013
Chicago unveils $1.1 billion plan for DePaul arena, Navy Pier upgrades
Hoping to send a loud message that Chicago is serious about luring tourism and entertainment spending, Mayor Rahm Emanuel has released details of two initiatives that have been developing for more than a year and that it says will mean $1.1 billion in investment in the McCormick Place and Navy Pier areas.
| May 16, 2013
Michael R. Bohn named Executive VP at Gilbane
Gilbane has promoted Michael R. Bohn to executive vice president. With over 28 years of service to the company and leadership roles on such high-profile projects as the University of Michigan Biomedical Science Building and the University of Chicago Medical Center, Bohn will now have responsibility for Gilbane’s New York and Midwest business units.