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
| Mar 15, 2011
Passive Strategies for Building Healthy Schools, An AIA/CES Discovery Course
With the downturn in the economy and the crash in residential property values, school districts across the country that depend primarily on property tax revenue are struggling to make ends meet, while fulfilling the demand for classrooms and other facilities.
| Mar 14, 2011
Renowned sustainable architect Charles D. Knight to lead Cannon Design’s Phoenix office
Cannon Design is pleased to announce that Charles D. Knight, AIA, CID, LEED AP, has joined the firm as principal. Knight will serve as the leader of the Phoenix office with a focus on advancing the firm’s healthcare practice. Knight brings over 25 years of experience and is an internationally recognized architect who has won numerous awards for his unique contributions to the sustainable and humanistic design of healthcare facilities.
| Mar 11, 2011
University of Oregon scores with new $227 million basketball arena
The University of Oregon’s Matthew Knight Arena opened January 13 with a men’s basketball game against USC where the Ducks beat the Trojans, 68-62. The $227 million arena, which replaces the school’s 84-year-old McArthur Court, has a seating bowl pitched at 36 degrees to replicate the close-to-the-action feel of the smaller arena it replaced, although this new one accommodates 12,364 fans.
| Mar 11, 2011
Temporary modular building at Harvard targets sustainability
Anderson Anderson Architecture of San Francisco designed the Harvard Yard childcare facility, a modular building manufactured by Triumph Modular of Littleton, Mass., that was installed at Harvard University. The 5,700-sf facility will remain on the university’s Cambridge, Mass., campus for 18 months while the Harvard Yard Child Care Center and the Oxford Street Daycare Coop are being renovated.
| Mar 11, 2011
Holiday Inn reworked for Downtown Disney Resort
The Orlando, Fla., office of VOA Associates completed a comprehensive interior and exterior renovation of the 14-story Holiday Inn in the Downtown Disney Resort in Lake Buena Vista, Fla. The $25 million project involved rehabbing the hotel’s 332 guest rooms, atrium, swimming pool, restaurant, fitness center, and administrative spaces.
| Mar 11, 2011
Renovation energizes retirement community in Massachusetts
The 12-year-old Edgewood Retirement Community in Andover, Mass., underwent a major 40,000-sf expansion and renovation that added 60 patient care beds in the long-term care unit, a new 17,000-sf, 40-bed cognitive impairment unit, and an 80-seat informal dining bistro.
| Mar 11, 2011
Research facility added to Texas Medical Center
Situated on the Texas Medical Center’s North Campus in Houston, the new Methodist Hospital Research Institute is a 12-story, 440,000-sf facility dedicated to translational research. Designed by New York City-based Kohn Pedersen Fox, with healthcare, science, and technology firm WHR Architects, Houston, the building has open, flexible labs, offices, and amenities for use by 90 principal investigators and 800 post-doc trainees and staff.
| Mar 11, 2011
Blockbuster remodel transforms Omaha video store into a bank
A former Hollywood Video store in Omaha, Neb., was renovated and repurposed as the SAC Federal Credit Union, Ames Branch. Architects at Leo A Daly transformed the outdated 5,000-sf retail space into a modern facility by wrapping the exterior in poplar siding and adding a new glass storefront that floods the interior with natural light.
| Mar 11, 2011
Historic McKim Mead White facility restored at Columbia University
Faculty House, a 1923 McKim Mead White building on Columbia University’s East Campus, could no longer support the school’s needs, so the historic 38,000-sf building was transformed into a modern faculty dining room, graduate student meeting center, and event space for visiting lecturers, large banquets, and alumni organizations.
| Mar 11, 2011
Mixed-income retirement community in Maryland based on holistic care
The Green House Residences at Stadium Place in Waverly, Md., is a five-story, 40,600-sf, mixed-income retirement community based on a holistic continuum of care concept developed by Dr. Bill Thomas. Each of the four residential floors houses a self-contained home for 12 residents that includes 12 bedrooms/baths organized around a common living/social area called the “hearth,” which includes a kitchen, living room with fireplace, and dining area.
