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  #1  
Old 1/13/10, 7:15 PM
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Nick Gromicko Nick Gromicko is offline
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Default Hard Water. Please proof this new inspection article.
Hard Water


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  #2  
Old 1/13/10, 9:38 PM
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Default Re: Hard Water. Please proof this new inspection article.
http://en.wikipedia.org/wiki/Hard_water


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  #3  
Old 1/13/10, 10:14 PM
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Michael Larson Michael Larson is offline
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Default Re: Hard Water. Please proof this new inspection article.
The hardnesss table in PPM is not how hardness is generally referred to.

BTW-There is very noticeable difference between 4 grains and 0 grains hardness.

Classification mg/l or ppm ____________grains/gal

___________Soft 0 - 17.1____________ 0 - 1
___________Slightly hard 17.1 - 60 ____1 - 3.5
___________Moderately hard 60 - 120 __3.5 - 7.0
___________Hard 120 - 180 __________7.0 - 10.5
___________Very Hard 180 & over _____10.5 & over


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Last edited by mlarson; 1/13/10 at 10:18 PM..
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Old 1/14/10, 10:20 AM
Rob London Rob London is offline
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Default Re: Hard Water. Please proof this new inspection article.
Quote:
Originally Posted by mlarson View Post
The hardnesss table in PPM is not how hardness is generally referred to.

BTW-There is very noticeable difference between 4 grains and 0 grains hardness.

Classification mg/l or ppm ____________grains/gal

___________Soft 0 - 17.1____________ 0 - 1
___________Slightly hard 17.1 - 60 ____1 - 3.5
___________Moderately hard 60 - 120 __3.5 - 7.0
___________Hard 120 - 180 __________7.0 - 10.5
___________Very Hard 180 & over _____10.5 & over

Altered, thanks


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