NSF International and the American Society of Plumbing Engineers (ASPE) signed a memorandum of understanding (MOU) to advance and promote public health and sustainability initiatives for the plumbing industry. Under the MOU, the two groups will work cooperatively to leverage their resources to support the plumbing industry and regulators. The agreement will continue the advancement of safe drinking water through research and development and, as opportunities arise, the introduction of new standards and codes.