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
Architects | Jan 28, 2016
2015 was a record year for mergers and acquisitions in the AE industry [infographic]
Consulting firm Morrissey Goodale tracked a record 234 sales of U.S.-based A/E firms last year.
Architects | Jan 27, 2016
NCARB to rename the Intern Development Program
This June, the program designed to guide aspiring architects through the early stages of their career will be renamed the Architectural Experience Program (AXP).
Architects | Jan 26, 2016
HOK promotes Bill Hellmuth to chief executive
Hellmuth is set to replace Patrick MacLeamy, who will remain as the firm’s chairman.
Mixed-Use | Jan 25, 2016
SOM unveils renderings of dual-tower Manhattan West development
The five million-sf project includes two office towers, a residential tower, retail space, and a new public square.
Office Buildings | Jan 21, 2016
Nike reveals design, first images of planned 3.2 million-sf expansion to its world headquarters
The expansion looks to combine design elements inspired by human movement, speed, and the strength and energy of competition.
Market Data | Jan 20, 2016
Architecture Billings Index ends year on positive note
While volatility persists, architecture firms reported healthy performance for 2015.
Architects | Jan 18, 2016
EHDD’s Monterey Bay Aquarium wins AIA Twenty-five Year Award
The aquarium set new technical standards for the building type, which still influence today, such as the flow-through seawater-based heat pump system, naturalistic exhibitions, and corrosion protection.
Architects | Jan 15, 2016
Best in Architecture: 18 projects named AIA Institute Honor Award winners
Morphosis' Perot Museum and Studio Gang's WMS Boathouse are among the projects to win AIA's highest honor for architecture.
| Jan 14, 2016
How to succeed with EIFS: exterior insulation and finish systems
This AIA CES Discovery course discusses the six elements of an EIFS wall assembly; common EIFS failures and how to prevent them; and EIFS and sustainability.
Market Data | Jan 13, 2016
Morgan Stanley bucks gloom and doom, thinks U.S. economy has legs through 2020
Strong job growth and dwindling consumer debt give rise to hope.