An acceptable level range for water hardness is going to be 100- 300 PPM depending on what city you live in and what the water treatment plant has decided on.
A water hardness of 0 to 3 gpg is soft water, 3 to 7 gpg is moderately hard and 7 to 11 gpg is considered hard. Anything more than 11 is considered very hard.
Soft water provided by a utility does not need additional softening and may cause corrosion issues for your home. Make sure the softener is set to the hardness of your water supply. If the hardness is set too high, the softener will cost more to operate and waste water, costing you extra money.
Measures of water hardness
General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard.
The higher the number, the softer the water. – Quora. Hard water usually contains minerals in the water that when that water is used to wash dishes or take a bath it leaves behind a residue.
The level of water softener salt in a brine tank should be at least one quarter full, no more than 4-6 inches below the top of the tank, and a few inches above the water level. Before adding any new salt to a tank, loosen any encrusted salt stuck to the sides of the tank.
|Hardness in Grains Per Gallon||1 to 2 people*||7 to 8 people*|
|31-40 GPG||40,000 Grain||96,000 Grain|
|41-50 GPG||64,000 Grain||110,000 Grain|
|51-75 GPG||64,000 Grain||110,000 Grain|
|76-100 GPG||80,000 Grain||110,000 Grain|
|Type of Water||Hardness|
|Soft water||10-50 ppm|
|Slightly hard water||50-100 ppm|
|Hard water||100-200 ppm|
|Very hard water||Over 200 ppm|
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. For example if your water test shows 250 mg/L hardness you actually have 14.62 grains per gallon.
Water hardness can be easily measured using a simple soap test kit that will measure in “grains of hardness” (a little bottle with a line marked on it which you fill to the line with water, add a drop of soap, and shake to look for suds. More drops of soap – more degrees of hardness).
In general, water with less than 60 ppm can be considered soft, water with 60-120 ppm moderately hard, and water with greater than 120 ppm hard.
Natural waters may range from close to zero hardness to many hundreds of parts per million. In our experience, water over 100 or 150 ppm (approximately 8 – 10 grains/gallon) is hard enough to warrant water softening. When the water hardness exceeds 250 – 300 ppm, a water softener becomes somewhat of a necessity.
There is no such thing as too soft water. Hard water contains metal cations and nonmetal anions. In a softener, the cations are replaced by sodium ions, and the anions are replaced by chloride ions. Once all the hardness ions have been replaced, the process stops.
Don’t Add Too Much Salt
Adding too much salt to your water quality softener can cause salt “bridging,” or a buildup and solidification of regenerant. This buildup can prevent your system from regenerating properly.
Your salt consumption will depend on the level of water hardness (minerals in your water) and the amount of water your household consumes. The average family of four with hard water (7-10 grains per gallon hardness level) will use about one 40-lb bag of salt each month.
The following classifications are used to measure hardness in water: soft 0 – 17.1 parts per million (ppm); slightly hard 17.1 – 60 ppm; moderately hard 60 – 120 ppm; hard 120 – 180 ppm; and very hard 180 or more ppm.
Hard water (high mineral content) is usually high in pH. Soft water (low mineral) is usually low in pH. The mineral in hard water will act as a buffer which will reduce the amount of acid in the water. The resulting water will be more alkaline and higher in pH.
Hardness is a measure of the magnesium, calcium, and carbonate minerals in water. Water is considered soft if total hardness is less than 75 ppm, moderately hard at 75 to 150 ppm, hard at 150 to 300 ppm, and very hard at 300 ppm or higher.
For your water, 170 PPM is the same as saying the water has 10 grains per gallon of hardness. This is moderately hard but not extremely hard water. You may expect to see some white scale building up on fixtures, but many homeowners live with 10 grain per gallon water with no problems.
TDS and hardness are water quality parameters. The main difference between TDS and hardness is that TDS include inorganic and organic substances that cannot be filtered through a filter paper whereas hardness is due to the presence of magnesium and calcium salts of carbonate, sulfate and chloride.
Water is in the range of 100 to 200 ppm of hardness is considered moderately ‘hard’ water. … In our experience, water over 100 to 150 ppm (which also can be expressed as approximately 8 – 10 grains/gallon) is hard enough to warrant water softening, so water softening is recommended for your water.
Moderately Hard Water: 3.5 – 7 GPG (or 61 – 120 PPM) Hard Water: 7 – 10 GPG (or 121 – 180 PPM) Very Hard Water: 10 – 14 GPG (or 181 – 240 PPM) Extremely Hard Water: Over 14 GPG (or over 240 PPM)
Hardness is Reported in PPM [parts per million] or GPG [grains per gallon]. The perfect hardness for a water ionizer is about 80 – 100 parts per million or 6-7 grains per gallon of hardness. Even though 75 to 100 ppm of hardness is considered hard, it’s not going to interfere with ionization at those levels.
Contaminants removed by the water softening (ion exchange) process. The ion exchange water softening process can remove nearly all calcium and magnesium from source water. Softeners may also remove as much as 5-10 ppm (parts per million; ppm is equal to milligrams per liter, or mg/L) of iron and manganese.
Compared to hard water, softened water feels slippery or silky. When people first start using softened water, they tend to use the same amount of soap that they previously used with hard water. So you might also feel a slippery residue on your skin after washing because you’ve used too much soap.
Water softening salts are essential to treat water and maintain the high performance of water softeners. When the water softener runs out of salt, it can cause long term damage and harm your water fixtures. It can even result in tank overflowing.
Water Softener Crystals are recommended for households that have lower than average water consumption or for those who use a two-part water softening system. … Water Softener Pellets can help reduce bridging, work better for moderate to high volume water users, and all-in-one tank system users.
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