The full form of NSF pipe refers to a pipe certified by the National Sanitation Foundation.
While NSF doesn't inherently stand for something specific when referring to "NSF pipe," it signifies that the pipe has been tested and certified by the National Sanitation Foundation (now known as NSF International) to meet specific standards for safety and performance related to potable water and other applications. It's an assurance of quality and suitability for its intended use. An NSF-rated pipe has passed certain standards or test procedures and is certified for use in residential or commercial plumbing projects. It's important to note that there are various NSF standards with differing applications.
