Degree of hardness grains per gallon gpg ppm or mg l soft 1 0 17 0 slightly hard 1 0 3 5 17 1 60 moderately hard 3 5 7 0 60 120 hard 7 0 10 5 120 180 very hard 10 5 180.
Water hardness 10 grains per gallon.
Beware of companies that tell you that each ppm of iron is equal to 4 5 grains per gallon of hardness.
Extremely hard water 10 5 gpg total grains x 17 1 equals ppm warning.
A grain of water hardness is comparable to 1 7000th of a pound.
The only time you see this is when an unscrupulous company is using a water softener as an iron filter.
Plus if your water contains iron you will need to add some additional hardness to it.
This range signifies the grain capacity.
Grains per gallon is the business standard approach for talking about water hardness.
Jumping mg l by 17 1 will change it to gpg.
Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement.
The grains per gallon for moderately hard hard and very hard water are respectively 3 5 to 7 7 to 10 5 and over 10 5.
Softening may noticeably improve the taste and quality of water in these.
The hardness on the softener head settings panel is determined by the number of grains per gallon of water gpg.
Jumping mg l by 17 1 will change it to gpg.
Divide the ppm hardness value by 17 1 the conversion factor for ppm to gpg.
For example say you have a water hardness value of 180 ppm.
Water hardness conversion table ppm mmol l mg l french degrees german degrees grains per gallon degrees clark 1 is 0 0099 1 0 1 0 056 0 058 0 07 10 is 0 099 10 1 0 56 0 58 0 7 14 3 is 0 142 14 3 1 43 0 8 0.
Ppm parts per million mg l milligrams per liter gpg grains per gallon manufacturing and water hardness utah has been moving up the ranks as a leading state for manufacturing bringing in more than 20 billion per year.
Work out 180 17 1 10.