NSF

NSF International is a not for profit foundation formed by the University of Michigan School of Public Health in 1944. It's mission is public health safety protection which is accomplished through technical research, education,
standards writing in the areas of water, food, air, sustainability and quality, along with product testing, systems analysis, facility inspections, and ongoing third party conformity assessment and certification.

NSF is a Nationally Recognized Testing Laboratory by ANSI, SCC, IAS numerous state and local agencies for many hundreds of standards for safety of water, food, products and systems.  NSF was ANSI's first Auditor Designator meaning that NSF was the first standards writer to become accredited such that when we complete a standard is automatically an ANSI Standard. 

NSF provides integrated in-house assessment services incorporating engineering, electrical, performance, chemical, microbiological, and other disciplines as noted in products standards from NSF, EPA, AOAC, ASTM, ASME, ASSE, AWWA, British Standards (BS), CSA, EN, ISO, UL, and others.  NSF has over 800 staff and over 150,000 square-feet of research, testing, laboratory space in its 225,000 square-foot corporate facility in Ann Arbor, MI. USA.

For more than 50 years NSF has tested and certified products for the aquatics and pool and spa industry. NSF began working in the recreational water pool and safety market in the 1950s.  NSF was formally asked by public health officials trade associations APHA, etc. and the pool and spa trade association, NSPI to take a more direct management role in development of product standards, testing and certification of products for the pool and spa industy. NSF International issued its first product testing reports and certifications in 1960. 

NSFs Recreational Water Program is constructed around NSF/ANSI Standard 50 -(2009a) Equipment for Swimming Pools, Spas, Hot Tubs and Other Recreational Water Facilities. Where appropriate, this standard references the NSF developed criteria and certain subordinate or external criteria and standards such as ASTM F2208, ASTM F2837, ASTM F1346, ASME A112.19.8, ASME A112.19.17, IAPMO PS-33 etc. This standard covers: SVRS, Suction Fittings, Pool Alarms, Pool Covers, PVC Hose, Filters, Pumps, Skimmers, Valves, Piping, Fittings, Chemical Feeding Systems, Chemical Generating Systems, Ozone systems, UV systems, Electrolytic and Brine type Chlorine and Bromine systems, Cu-Ag ion systems, Automatic Controllers, Water Quality Testing Devices and much more.

For more information about NSF, go here   http://www.nsf.org/info/pools