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
| Aug 11, 2010
Report: Building codes and regulations impede progress toward uber-green buildings
The enthusiasm for super green Living Buildings continues unabated, but a key stumbling block to the growth of this highest level of green building performance is an existing set of codes and regulations. A new report by the Cascadia Region Green Building Council entitled "Code, Regulatory and Systemic Barriers Affecting Living Building Projects" presents a case for fundamental reassessment of building codes.
| Aug 11, 2010
Call for entries: Building enclosure design awards
The Boston Society of Architects and the Boston chapter of the Building Enclosure Council (BEC-Boston) have announced a High Performance Building award that will assess building enclosure innovation through the demonstrated design, construction, and operation of the building enclosure.
| Aug 11, 2010
Portland Cement Association offers blast resistant design guide for reinforced concrete structures
Developed for designers and engineers, "Blast Resistant Design Guide for Reinforced Concrete Structures" provides a practical treatment of the design of cast-in-place reinforced concrete structures to resist the effects of blast loads. It explains the principles of blast-resistant design, and how to determine the kind and degree of resistance a structure needs as well as how to specify the required materials and details.
| Aug 11, 2010
ACSA announces 2008-2009 ACSA/AISC steel design student competition winners
The Association of Collegiate Schools of Architecture (ACSA) is pleased to announce the winners of the ninth annual steel design student competition for the 2008-2009 academic year. Administered by the Association of Collegiate Schools of Architecture (ACSA) and sponsored by the American Institute of Steel Construction (AISC), the program challenged students, working individually or in teams, to explore a variety of design issues related to the use of steel in design and construction.
| Aug 11, 2010
ZweigWhite Announces 2009 Best Firms to Work For
Management consulting and research firm ZweigWhite has identified the best civil engineering, structural engineering, multidiscipline A/E services, environmental services, and architecture firms to work for in its annual ranking of top industry firms. These outstanding employers were selected based on their commitment to provide a positive work environment and challenging and interesting work opportunities for their employees.
| Aug 11, 2010
Autodesk 2010 Certification Now Available for Design Professionals
Autodesk, Inc., (Nasdaq: ADSK), today announced that design and engineering professionals can become Autodesk Certified in AutoCAD 2010, Autodesk Inventor 2010, Autodesk Revit Architecture 2010, and AutoCAD Civil 3D 2010 software. Becoming Autodesk Certified allows professionals, and companies boasting Autodesk Certified employees, to validate their industry skills and knowledge, demonstrate expertise and gain credibility.
