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To use the same hardness scale above, you can simply convert your ppm or mg/L by dividing that number by 17.1 to find the gpg equivalent. So, for example, 130 mg/L or ppm would be 7.6 gpg, which is considered hard water.
The majority of findings are delivered as a number that reports the concentration of calcium carbonate or other equivalents for a given unit of water. The water hardness scale result may be expressed in parts per million (ppm), grains per gallon (gpg), or milligrams per liter (mg/L).
The internationally recognized water hardness scale recognizes 4 water hardness classes; from soft, moderately hard, hard, to very hard. By definition, water hardness is the total sum of molar concentrations of calcium ions (Ca 2+) and magnesium ions (Mg 2+).
According to the Water Quality Association, the hardness scale, measured in gpg of calcium carbonate, can be represented as follows: Less than 1 gpg is considered soft; Between 1 and 3.5 gpg is considered slightly hard; Between 3.5 and 7 gpg is considered moderately hard; Between 7 and 10.5 gpg is considered hard; More than 10.5 gpg is ...
The level of hardness is measured in grains per gallon (gpg) or milligrams per liter (mg/L). Water that registers between 0-1 gpg is considered soft; moderately hard water reads at 3.5-7 gpg; and any water with gpg over 7 is classified hard to very hard.
To find out what size water softener you need, you must identify factors such as water hardness levels and daily water consumption habits, then use this information to choose the proper softener capacity.
31 Μαΐ 2022 · Your water softener hardness setting should be based on your water supplies water hardness level and its iron concentration, for example a water hardness level of 25 grains per gallon (gpg) and 0.3 parts per million (ppm) of iron would result in a water softener hardness setting of 27.
