Historical
NSF/ANSI 46 -2012
Evaluation of components and devices used in wastewater treatment systems
This edition of the Standard (NSF/ANSI 46-2012) includes the following revisions: Issue 22 - The purpose of this ballot was to make the language relating to failure sensing equipment in the wastewater standards consistent as well as update it regarding the testing procedure. This change appears in 9.6.2, 11.4.1, 12.5.1 and 13.3.2.
NSF International [nsf]