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This section of the directory lists those circulation system components and related materials that have been WQA Certified in accordance with "Circulation system components and related materials for swimming pools, spas/hot tubs" NSF/ANSI-50, and is published periodically by the Water Quality Association (WQA), as a service to the industry and consumers. The WQA is a not-for-profit international association of manufacturers, distributors, and dealers of water treatment systems for household, commercial, and industrial applications. This on-line directory is continuously updated to identify those water treatment equipment products that have been tested and passed stringent industry standards to become certified by the Water Quality Association.
Certification means that a production model of the listed line of circulation system components, or related materials, was tested at the Water Quality Association laboratory, or any of the other testing laboratories recognized by the Water Quality Association, and was found to have met the requirements of NSF/ANSI-50. In addition, the materials and components used in these certified units have met the rigorous safety and structural integrity and strength requirements set by industry Standard NSF/ANSI-50.
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