ANSI/NSF 44(i27)-2007
Residential cation exchange water softners

Standard No.

ANSI/NSF 44(i27)-2007

Release Date

2007

Published By

American National Standards Institute （ANSI)

Scope

To include USEPA methods 524.2 and 525.2 in Tables 1 and 2 and include language to ensure when using the GC/MS (method 625) an adequate analytical library has been developed.