NSF International tests, audits, and certifies products used in recreational water applications. NSF uses a variety of existing criteria and standards (NSF, ASTM, APSP, ASME, UL, IAPMO, USEPA, etc.) in the evaluation of recreational water products. We also work with manufacturers to create new standards or modify existing standards as needed to meet market demands and innovative product designs.
The most often used standard is NSF/ANSI Standard 50 – Equipment for Pools, Spas, Hot Tubs, and Other Recreational Water Facilities (2011) Evaluation criteria for materials, components, products, equipment, and systems for use at recreational water facilities. This standard contains a wide variety of requirements which address materials, products, and equipment used at recreational water facilities. NSF 50 includes safety products and items used in the water circulation, filtration, treatment and monitoring of residential and public swimming pools, spas, hot tubs and water-parks. NSF 50 incorporates minimum requirements for materials health and safety, corrosion resistance, product marking and data plates, product design, construction, product performance, burst and/or cyclic pressure safety, output, product durability or life, bacterial and cryptosporidium inactivation, etc. for items including but not limited to:
NSF also evaluates other products used at recreational water facilities such as portable spas, aquatic exercise equipment and swim current generators, heaters, flow meters, pressure meters, thermometers, etc.
The registered NSF Certification Mark on a recreational water products confirms that NSF has assessed - and certified - its conformity with NSF Standard 50 and or other evaluation criteria.