NSF 53-2013 Addendum 1
- Drinking water treatment units - Health effects - Addendum 1
- Amendment by NSF International, 08/01/2014
- Category: NSF
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This Amendment contains the following revisions:
- Issue 94 - The revision corrects an error recently found in NSF/ANSI 53. When the standard was reformatted several years ago, section 1.3 - Alternate materials, designs, and construction was mistakenly omitted (it is currently still listed in NSF/ANSI 42). This language has been reinserted to its previous location under section 1.
- Issue 95 - The revision allows for a shorter cycle time for performance indication devices (PID) during the flow test method under section 6.
- Issue 96 - The revision allows for alternate methods for enumerating the stock oocyst and microsphere suspensions.
- Issue 97 - The revision removes the reference to using formaldehyde as a disinfectant when perparing oocyts in the procedure under Annex A of NSF/ANSI 53.
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