Master Spas’ Michael Phelps Signature Swim Spas First to Earn Certification to New Protocol

ANN ARBOR, Mich. & FORT WAYNE, Ind. — NSF International, an independent global organization that writes standards, tests and certifies products for the water, food and consumer goods industries, has developed the first comprehensive protocol that evaluates the performance, health and safety of every component of a swim spa. Master Spas’ Michael Phelps Signature Swim Spas are the first to earn certification to the new protocol.

For over 50 years, NSF International has applied its technical and scientific expertise to improve the safety, quality and performance of pools and spas by developing innovative standards for recreational water equipment and components. NSF engineers incorporated requirements from 16 different national pool and spa safety and quality standards into this new protocol, including NSF/ANSI 50, to simplify the evaluation process for swim spas.

The NSF protocol – CCS-11804: Component Certification Specification for Public Use Spa, Swim Spa, Hot Tub or Related Equipment - includes testing and evaluation criteria in the following areas:

  • Performance testing – evaluates the durability, strength and chemical resistance of the spa shell and other components.
  • Material evaluation – verifies that water contact materials meet regulations for corrosion resistance, toxicological health and safety and do not leach harmful contaminants into the swim spa water.
  • Accessibility and safety features – tests the effectiveness of safety features such as floor and step slip resistance, step dimensions, depth markings, handholds and railings.
  • Filtration and water chemistry – ensures the chemical treatment, water skimming and particulate filtration systems perform at a high level and effectively filter contaminants.
  • Suction fittings and systems testing – tests the entire swim current or exercise system for entrapment safety. This includes verifying that suction vacuum release systems and suction fittings are compliant with ANSI/APSP 16 (formerly known as ASME/ANSI A112.19.8), as mandated by the Virginia Graeme Baker Pool and Spa Safety Act.

Master Spas’ Michael Phelps Signature Spas (MPRX 17 and MPRX18) are the first swim spas to earn NSF International certification to the new CCS-11804 protocol. In addition to meeting the requirements of the protocol, NSF conducted an audit of Master Spas’ manufacturing facility in Fort Wayne, Ind. to verify conformance to quality assurance and control requirements, and to confirm only authorized materials and components are used in the manufacturing of the swim spas. To ensure ongoing compliance, NSF will conduct annual unannounced facility audits and periodic retesting.

“We hold ourselves to high quality standards and as a leader in the industry, we felt it was important to meet the standards for NSF Certification under this new protocol. As we enter the commercial market, we want facility owners and operators, as well as regulatory officials to rest assured that every aspect of Michael Phelps Signature Swim Spas have been tested and certified to the highest national standards by a trusted independent public health and safety organization,” said Robert Lauter, CEO of Master Spa.

“This protocol marks another milestone in NSF’s legacy in the recreational water industry as it is the first to incorporate requirements from over 16 national standards and test protocols to create one comprehensive standard for the performance, health and safety of spas and swim spas. This new protocol will clarify and simplify the required evaluation and testing process for product manufacturers and better meet the needs of recreational water facility operators and health officials,” said Dave Purkiss, General Manager of NSF International’s Water Division.

NSF International will propose CCS-11804 as an addition to the American national standard for pool and spa components – NSF/ANSI 50 – this year. NSF/ANSI Standard 50: Equipment for Pools, Spas, Hot Tubs, and Other Recreational Water Facilities specifies the testing requirements for virtually every product used at a recreational water facility. NSF International developed NSF 50 through a consensus process with balanced input from the regulatory, industry, academic and consumer communities. NSF 50 continues to evolve to incorporate the latest test methods and regulations and is required by most U.S. states.

To view Master Spas’ online listing, visit NSF’s website. For more information on NSF International’s recreational water certification program, contact Richard Martin at, 734-769-5346 or visit NSF’s recreational water webpage.

About NSF International: NSF International is an independent organization that writes standards, tests and certifies products for the food, water and consumer goods industries to minimize adverse health effects and protect the environment ( Founded in 1944, NSF is committed to protecting human health and safety worldwide. NSF is a World Health Organization Collaborating Centre for Food and Water Safety and Indoor Environment.

NSF International's Water Programs require extensive product testing and unannounced audits of production facilities to verify pool and spa equipment, water treatment and filtration products meet design, material and performance requirements. NSF International’s Recreational Water Certification program tests and certifies virtually every pool and spa product used in commercial and residential water facilities.  NSF led the development of NSF/ANSI 50, the American national standards for all pool and spa components and equipment. Today, most U.S. states require certification to NSF/ANSI 50 for all pool and spa equipment used in recreational water facilities.

Additional NSF International services include management systems registrations delivered through NSF International Strategic Registrations (NSF-ISR); food safety and quality programs through the NSF Food Safety Division; pharmaceutical, medical device and nutritional supplement auditing and certification through the NSF Health Sciences Division; sustainability services through NSF Sustainability, and NSF Education and Training programs.