On January 6, 2009 five prominent organizations signed a historic Memorandum of Understanding (MOU). The MOU created a collaborative network to advance plumbing research initiatives pertaining to water efficiency. The signatories included the Alliance for Water Efficiency, the International Association of Plumbing and Mechanical Officials, the International Code Council, the Plumbing Heating Cooling Contractors, and the Plumbing Manufacturers Institute. The American Society of Plumbing Engineers joined PERC on February 22, 2011.
On December 3, 2010 the Plumbing Efficiency Research Coalition (PERC) and the Australasian Scientific Review of Reduction of Flows on Plumbing and Drainage Systems (ASFlow) Committee signed a historic Memorandum of Understanding (MoU) at U.S. EPA headquarters in Washington D.C. Both organizations are working on research programs that seek to investigate the impact of reduced water flows in sanitary drainage systems resulting from reductions in water use from plumbing fixtures and fittings, appliances and commercial and institutional equipment.
- AS-Flow_PERC_MOU (PDF)