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
MFPRO+ Research | Sep 11, 2023
Conversions of multifamily dwellings to ‘mansions’ leading to dwindling affordable stock
Small multifamily homes have historically provided inexpensive housing for renters and buyers, but developers have converted many of them in recent decades into larger, single-family units. This has worsened the affordable housing crisis, say researchers.
Engineers | Sep 8, 2023
Secrets of a structural engineer
Walter P Moore's Scott Martin, PE, LEED AP, DBIA, offers tips and takeaways for young—and veteran—structural engineers in the AEC industry.
Healthcare Facilities | Sep 8, 2023
Modern healthcare interiors: Healing and care from the outside in
CO Architects shares design tips for healthcare interiors, from front desk to patient rooms.
Designers | Sep 5, 2023
Optimizing interior design for human health
Page Southerland Page demonstrates how interior design influences our mood, mental health, and physical comfort.
K-12 Schools | Sep 5, 2023
CHPS launches program to develop best practices for K-12 school modernizations
The non-profit Collaborative for High Performance Schools (CHPS) recently launched an effort to develop industry-backed best practices for school modernization projects. The Minor Renovations Program aims to fill a void of guiding criteria for school districts to use to ensure improvements meet a high-performance threshold.
Market Data | Sep 5, 2023
Nonresidential construction spending increased 0.1% in July 2023
National nonresidential construction spending grew 0.1% in July, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.08 trillion and is up 16.5% year over year.
Sports and Recreational Facilities | Sep 1, 2023
New Tennessee Titans stadium conceived to maximize types of events that can be hosted
The new Tennessee Titans stadium was conceived to maximize the number and type of events that the facility can host. In addition to serving as the home of the NFL’s Titans, the facility will be a venue for numerous other sporting, entertainment, and civic events. The 1.7-million sf, 60,000-seat, fully enclosed stadium will be built on the east side of the current stadium campus.
Mass Timber | Sep 1, 2023
Community-driven library project brings CLT to La Conner, Wash.
The project, designed by Seattle-based architecture firm BuildingWork, was conceived with the history and culture of the local Swinomish Indian Tribal Community in mind.
Office Buildings | Aug 31, 2023
About 11% of U.S. office buildings could be suitable for green office-to-residential conversions
A National Bureau of Economic Research working paper from researchers at New York University and Columbia Business School indicates that about 11% of U.S. office buildings may be suitable for conversion to green multifamily properties.
Adaptive Reuse | Aug 31, 2023
New York City creates team to accelerate office-to-residential conversions
New York City has a new Office Conversion Accelerator Team that provides a single point of contact within city government to help speed adaptive reuse projects. Projects that create 50 or more housing units from office buildings are eligible for this new program.
