grains per gallon (GPG) definition

grains per gallon (GPG)

Unit of water hardness. One GPG is 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water. It translates into 1 part in 70,000 parts of water or 14.3 parts per million (PPM). Also called Clark degree. See also hard water.

grains per gallon (GPG) is in the Industries, Manufacturing, & Technology subject.

grains per gallon (GPG) appears in the definition of the following term: Clark degree

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