NSF/ANSI 50-2012

Equipment for swimming pools, plas, hot tubs and other recreational water facilities

In this edition of NSF/ANSI 50 the following revisions were incorporated: Issue 67 – Annex H When Annex H of NSF 50 was modified in 2005 the procedure eliminated the specific test method for ion generators. This revision reinstates a specific test method for ion generators as well as requires statements in the listing and use instructions that communicate disinfection capabilities of the certified systems. Issue 71 – Batch chlorination systems: This revision updated the operating condition specifications in 15.2 for batch chlorination system components. Issue 72 – Permeability :This revision added a test method for determination of the permeability and cake density of pre-coat filter media. Issue 79 – Life testing: This revision updated the life testing requirements for process equipment Issue 81 – Fence barriers, chemical feed stock, multi-port valve: This revision included modification or updates to: fences and barriers, valve handle clarification, spa temperature requirements, hardware interlock, and sensor output signal requirements. Issue 82 – Copper tests :This revision deleted the requirements for copper test kits for copper/silver ion generators in 16.1 and 16.16.Issue 83 – Electrical requirements: This revision rewrote and moved the electrical requirements to Annex J. Issue 84 – Vacuum ports, data plates, AISI, SPS 4This revision included modification or updates to: vacuum ports, data plates, and normative references. Issue 85 – Feeder output control, electrolytic ClBr, strainers, Annex G :This revision included modification or updates to: Annex G, electrolytic ClBr, non-integral strainers and feeder output control. Issue 86 – APSP: This revision replaced withdrawn Standard ANSI/ASME A112.19.8a with ANSI/APSP – 16.