Water Hardness Grains Per Gallon

The only time you see this is when an unscrupulous company is using a water softener as an iron filter.

Water hardness grains per gallon. Work out 180 17 1 10 526. This range signifies the grain capacity of most water softeners available on the market. Also called clark degree in terms of an imperial gallon. 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. Distributed water hardness june 2016. If hardness is in mg l or ppm convert it into gpg by dividing it with 17 1.

It takes 17 1 ppm to equal 1 gpg. 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. If a test for hard water is measured in parts per million or milligrams per liter you can take the total hardness level and divide it by 17 1 to get hardness in grains per gallon. Water in these two categories is by most accounts.

The hardness on the softener head settings panel is determined by the number of grains per gallon of water gpg. Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement. Divide by conversion factor. The degree of hardness standard as established by the american society of agricultural engineers s 339 and the water quality association wqa is.

Plus if your water contains iron you will need to add some additional hardness to it. A grain of water hardness is comparable to 1 7000th of a pound. For example if your water test shows 250 mg l hardness you actually have 14 62 grains per gallon. Formula to measure no of grains to be removed.

Grains per gallon is the business standard approach for talking about water hardness. Typically water that contains less than 1 grain per gallon is considered soft while water with 1 to 3 5 grains per gallon is slightly hard. One grain per gallon gpg is equivalent to 17 14 parts per million ppm. The result is the water hardness expressed in grains per gallon.

Hard 7 10 5 gpg total grains x 17 1 equals ppm extremely hard water 10 5 gpg total grains x 17 1 equals ppm warning. Beware of companies that tell you that each ppm of iron is equal to 4 5 grains per gallon of hardness.