National Sanitation Foundation (NSF)
NSF develop public health and certification programs that protect the world's food, water, consumers products and environment. They provide product/system certification to a wide range of products that contact with drinking water to ensure the products/materials do not impose an adverse health effect on human. It also includes product performance verification/validation, to ensure certified products perform according to its specification.
Testing Laboratory Roles in Product Approval Process
Testing laboratory such as Standardmark Laboratory provides accredited testing services on products for submitting organisations, where test report will be submitted to NSF for product approval purposes.