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Current IssueApril 23, 2014
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August 2004: Volume 46, Number 8

Softener Certification -- Standard 44 Capacity Testing
by Rick Andrew

We’ve all seen the advertised capacity claims associated with water softeners—“35,000 grain capacity,” for example. But where do these claims come from? One would imagine the claimed capacity has something to do with the amount of salt used for regeneration and the amount of cation exchange resin in the softener...

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For earlier columns in this category, click on the link below or hit the 'List All' button.
Structural Integrity and the DWTU Standards  July 2004
Lead and the Corrosion It Leaves Behind -- What the Washington, D.C., Case Taught Us  June 2004
How You Can Have an Impact on DWTU Standards  May 2004
Helping the Consumer Make an Informed Decision  April 2004
The Art and Science of Contaminant Reduction Test Methods  March 2004
Witness for Certification -- Product Testing Is Controlled, But Not Confined  February 2004
ANSI/NSF Standard 53 Cyst Test Dust Reduction -- The End of an Era  January 2004
Literature Requirements and DWTU Standards  December 2003
An Inside Look at the Certification of Hybrid Systems  November 2003
Arsenic and the ANSI/NSF Drinking Water Treatment Unit Standards  October 2003
Chemical Additives: A Closer Look at Product Testing for Standard 60  September 2003
Water Treatment in Food Service Establishments  August 2003