The Plumbing Efficiency Research Coalition, comprised of five plumbing trade groups, will make drain line transport its first research project. The coalition is made up of the Alliance for Water Efficiency; the International Association of Plumbing & Mechanical Officials; the International Code Council; the Plumbing-Heating-Cooling Contractors – National Association; and the Plumbing Manufacturers Institute.
Since the advent of 1.6-gallon per flush
toilets in 1992, many plumbing professionals has voiced concern on whether the
restricted flushes provide enough water for drain line transport of waste.
Recently, high efficiency toilets, which
use even less water per flush and other toilets that use just 1 gpf, have
raised these concerns again, particularly for larger commercial systems and
their long horizontal runs to the sewer. Drain line transport problems have
already been reported in Europe and Australia.
In addition to low-flow toilets,
waterless urinals, greywater systems and other appliances that use less water
means that much less water is being discharged into drainage systems.
To date, an extensive research project
of sufficient scope to be able to determine if significant problems could arise
regarding drain line transport has yet to be conducted.
IAPMO’sPete DeMarcowill serve as project coordinator for
this inaugural research study and will also chair the Technical Committee
assigned to the project. Each of the five member associations of PERC has named
a representative to this committee. The first order of business is to define
the parameters of the project.