Manage My Life

How do I convert a ppm water hardness number to a gpg to set the water softener?

by Manage My Life Last activity date:
October 13th, 2008

My water softener asks for a gpg hardness number. My water test results give me a ppm hardness figure. How do I convert the ppm to gpg?

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Building Supplies
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Answers (1)
Lyle W
1.0ppm = 0.058419gpg. To convert from ppm to gpg use the following formula:

ppm x 0.058419gpg/ppm = gpg



For example, 60ppm would equal 3.5gpg (60 X 0.058419).
by Lyle W | Earned 283 community points in Building Supplies |
October 13th, 2008
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