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
| Jul 1, 2013
Report: Global construction market to reach $15 trillion by 2025
A new report released today forecasts the volume of construction output will grow by more than 70% to $15 trillion worldwide by 2025.
| Jul 1, 2013
Elizabeth Chu Richter, FAIA, elected 2015 AIA President
Delegates to the American Institute of Architects (AIA) national convention in Denver elected Elizabeth Chu Richter (AIA Corpus Christi) to serve as the 2014 AIA first vice president/president-elect and 2015 AIA president.
| Jun 28, 2013
Calculating the ROI of building enclosure commissioning
A researcher at Lawrence Berkeley National Laboratory calls building enclosure commissioning “the single-most cost-effective strategy for reducing energy, costs, and greenhouse gas emissions in buildings today.”
| Jun 28, 2013
A brief history of windows in America
Historic window experts from Hoffmann Architects look back at the origin of windows in the U.S.
| Jun 28, 2013
Building owners cite BIM/VDC as 'most exciting trend' in facilities management, says Mortenson report
A recent survey of more than 60 building owners and facility management professionals by Mortenson Construction shows that BIM/VDC is top of mind among owner professionals.
| Jun 27, 2013
Thermal, solar control designs can impact cooling loads by 200%, heating loads by 30%
Underestimating thermal bridging can greatly undermine a building’s performance contributing to heating load variances of up to 30% and cooling load variances of up to 200%, says the MMM Group.
| Jun 26, 2013
New York’s ‘Scaffold Law’ may be altered to place larger burden on workers
New York's Scaffold Law, which “places the burden of responsibility on the contractor to prove that the job site was safe for workers,” could be facing a major change.
| Jun 26, 2013
Commercial real estate execs eye multifamily, retail sectors for growth, says KPMG report
The multifamily, retail, and hospitality sectors are expected to lead commercial building growth, according to the 2013 KPMG Commercial Real Estate Outlook Survey.
| Jun 25, 2013
Mirvish, Gehry revise plans for triad of Toronto towers
A trio of mixed-use towers planned for an urban redevelopment project in Toronto has been redesigned by planners David Mirvish and Frank Gehry. The plan was announced last October but has recently been substantially revised.
| Jun 25, 2013
First look: Herzog & de Meuron's Jade Signature condo tower in Florida
Real estate developer Fortune International has released details of its new Jade Signature property, to be developed in Sunny Isles Beach near Miami. The luxury waterfront condo building will include 192 units in a 57-story building near high-end retail destinations and cultural venues.
