date:Aug 13, 2013
drinking water filters, as well as pool and spa equipment. NSF led the development of the American National Standards for all materials and products that treat or come in contact with drinking water to help protect public health and the environment and minimize adverse health effects. In 1990, the U.S. EPA replaced its own drinking water product advisory program with these NSF standards. Today, most plumbing codes require certification to NSF standards for pipes and plumbing components in commer