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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).
Learn how to measure and classify water hardness using different units, such as grains per gallon (GPG), parts per million (PPM), and millimoles per liter (mmol/L). Find out the effects of hard water and how to soften it with a water softener.
Understanding how many grains per gallon is considered hard water is pivotal in gauging its impact on household chores and appliances. Water with higher grains per gallon hardness offers benefits, like imparting essential minerals to our diet and potentially enhancing the flavor of beverages like tea. However, the flip side is its strain on ...
Hard water is water that contains high levels of calcium and magnesium, measured in grains per gallon (gpg). Learn how hard water affects your home, health, and appliances, and how to test and treat it with a water softener.
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. 20,000–80,000: This range signifies the grain capacity of most water softeners available on the market.
Water hardness can be expressed in many different units, including French degrees, German degrees, Clark degrees, grains per gallon, mg/L CaCO3 (calcium carbonate), and ppm (parts per million). General conversions are below:
5 Ιουλ 2024 · The most common units of water hardness are GPG (grains per gallon), mg/L (milligrams of calcium per liter, and PPM (parts per million). mg/L and PPM are interchangeable. How much hardness does soft water contain? Soft water contains less than 1 GPG or 0 – 17 PPM or mg/L of total magnesium and calcium carbonate hardness. If your water ...
