When looking at measurements of hardness what is the difference between grains per gallon gpg and parts per million ppm.
Water hardness grains vs ppm.
As i said before though get in touch with the manufacturer or check the manual where this information is often provided on how to adjust for iron levels.
If hardness is in mg l or ppm convert it into gpg by dividing it with 17 1.
Jumping mg l by 17 1 will change it to gpg.
Ppm and mg l are the same thing.
For example say you have a water hardness value of 180 ppm.
Hard water has a noticeably unpleasant flavor but is still potable.
A grain of water hardness is comparable to 1 7000th of a pound.
The grain per gallon gpg is a unit of water hardness defined as 1 grain 64 8 milligrams of calcium carbonate dissolved in 1 us gallon of water 3 785412 l it translates into 1 part in about 58 000 parts of water or 17 1 parts per million ppm.
Divide the ppm hardness value by 17 1 the conversion factor for ppm to gpg.
Simply put multiplying a gpg hardness reading by 17 1 will tell you what the hardness is in ppm and conversely dividing a ppm hardness reading by 17 1 will yield the.
Typically water that contains less than 1 grain per gallon is.
Also called clark degree in terms of an imperial gallon.
Hard water usually requires water softening equipment to make it usable for a home.
Grains per gallon is the business standard approach for talking about water hardness.
Water that is classified as hard has 150 300 ppm of minerals dissolved in it.
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.
For example let s say your water hardness is 15 gpg and you have 2 ppm of iron.
Treated or softened water 0 1 gpg total grains x 17 1 equals ppm slightly hard 1 2 gpg total grains x 17 1 equals ppm medium hard 3 7 gpg total grains x 17 1 equals ppm hard 7 10 5 gpg total grains x 17 1.
Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement.
The result is the water hardness expressed in grains per gallon.
Cleaning agents do not react well with hard water and often a distinct oily white crust is left behind after cleaning.
Different agencies and organizations may use slightly different classifications when discussing water hardness.
Both units of measurement refer to the amount of hardness in the water tested.
Work out 180 17 1 10 526.
Formula to measure no of grains to be removed.
Ppm means parts per million mg l means milligrams per liter note.
