Water Hardness 20 Grains Per Gallon

First of all let s have a brief overview of what hardness setting means.

Water hardness 20 grains per gallon. Water in these two categories is by most accounts. One grain per gallon gpg is equivalent to 17 14 parts per million ppm. Water hardness can be measured in gpg or ppm but gpg is the most commonly used measurement. Formula to measure no of grains to be removed.

Convert water hardness from ppm to grains per us gallon. If hardness is in mg l or ppm convert it into gpg by dividing it with 17 1. Plus if your water contains iron you will need to add some additional hardness to it. Divide the ppm hardness value by 17 1 the conversion factor for ppm to gpg.

Also called clark degree in terms of an imperial gallon. Calculate softener capacity in grains. 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. Depending on your water hardness number daily water use and the number of people in the home you may need a smaller or larger grain capacity softener.

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. The result is the water hardness expressed in grains per gallon. Jumping mg l by 17 1 will change it to gpg. Ft3 resin x resin exchange capacity typically 30 000 grains ft3 grains capacity.

The hardness on the softener head settings panel is determined by the number of grains per gallon of water gpg. 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. 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. This range signifies the grain capacity of most water softeners available on the market.

118 ppm th 6 9 gpg. Work out 180 17 1 10 526. Grains per gallon is the business standard approach for talking about water hardness. The only time you see this is when an unscrupulous company is using a water softener as an iron filter.

Total hardness ppm total hardness gpg example. 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. Beware of companies that tell you that each ppm of iron is equal to 4 5 grains per gallon of hardness. For example if your water test shows 250 mg l hardness you actually have 14 62 grains per gallon.

Water softener hardness settings.