The Plumbing Efficiency Research Coalition (PERC) 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
Since the advent of 1.6-gallon per
flush toilets in 1992, many plumbing professionals have voiced concern on
whether the restricted flushes provide enough water for drain line transport of
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, grey water 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.