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Current IssueOctober 31, 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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