Water Hardness Grains Per Gallon Vs Ppm

When looking at measurements of hardness what is the difference between grains per gallon gpg and parts per million ppm.

Water hardness grains per gallon vs ppm.

Soft water is defined by american national standards nsf ansi 44 and nsf ansi 330 as water containing 1 grain of hardness per gallon or 17 1 mg l hardness. Different agencies and organizations may use slightly different classifications when discussing water hardness. Symptoms of hard water include. How many grains per gallon or whatever.

One grain per gallon gpg is equivalent to 17 14 parts per million ppm. Also called clark degree in terms of an imperial gallon. Hardness is usually expressed in grains per gallon or ppm as calcium carbonate equivalent. What is soft water.

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 say you have a water hardness value of 180 ppm. 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. Ppm and mg l are the same thing.

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. 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. Gpg means grains per gallon ppm means parts per million mg l means milligrams per liter note.

A grain of water hardness is comparable to 1 7000th of a pound. Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement. Jumping mg l by 17 1 will change it to gpg. Both units of measurement refer to the amount of hardness in the water tested.

This range signifies the grain capacity of most water softeners available on the market. Formula to measure no of grains to be removed. Grains per gallon is the business standard approach for talking about water hardness. Work out 180 17 1 10 526.