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
| Feb 23, 2011
Architecture Billings hold steady after two months of improving conditions
After showing positive momentum during the fourth quarter of 2010, the Architecture Billings Index (ABI) slipped almost four points in January. The January ABI score was 50.0, which is down from a reading of 53.9 the previous month, but still reflects stable demand for design services. Any score above 50 indicates an increase in billings.
| Feb 22, 2011
LEED Volume Program celebrates its 500th certified Pilot Project
More than 500 building projects have certified through the LEED Volume Program since the pilot launched in 2006, according to the U.S. Green Building Council. The LEED Volume Program streamlines the certification process for high-volume property owners and managers, from commercial real estate firms, national retailers and hospitality providers, to local, state and federal governments.
| Feb 22, 2011
HDR Architecture names four healthcare directors
Four senior professionals in HDR Architecture’s healthcare program have been named Healthcare directors.
| Feb 15, 2011
Iconic TWA terminal may reopen as a boutique hotel
The Port Authority of New York and New Jersey hopes to squeeze a hotel with about 150 rooms in the space between the old TWA terminal and the new JetBlue building. The old TWA terminal would serve as an entry to the hotel and hotel lobby, which would also contain restaurants and shops.
| Feb 15, 2011
New Orleans' rebuilt public housing architecture gets mixed reviews
The architecture of New Orleans’ new public housing is awash with optimism about how urban-design will improve residents' lives—but the changes are based on the idealism of an earlier era that’s being erased and revised.
| Feb 15, 2011
LAUSD commissions innovative prefab prototypes for future building
The LA Unified School District, under the leadership of a new facilities director, reversed course regarding prototypes for its new schools and engaged architects to create compelling kit-of-parts schemes that are largely prefabricated.
| Feb 15, 2011
New 2030 Challenge to include carbon footprint of building materials and products
Architecture 2030 has just broadened the scope of its 2030 Challenge, issuing an additional challenge regarding the climate impact of building products. The 2030 Challenge for Products aims to reduce the embodied carbon (meaning the carbon emissions equivalent) of building products 50% by 2030.
| Feb 15, 2011
New Urbanist Andrés Duany: We need a LEED Brown rating
Andrés Duany advocates a "LEED Brown" rating that would give contractors credit for using traditional but low cost measures that are not easy to quantify or certify. He described these steps as "the original green," and "what we did when we didn't have money." Ostensibly, LEED Brown would be in addition to the current Silver, Gold and Platinum ratings.
