Water Hardness Test

Water hardness can cause damage to the reverse osmosis (R.O.) system by forming scale and clogging up its membrane. 

Most municipal water or well water contains water hardness between 10 to 15 grains per gallon of water. The hardness should be removed by a water softener to less than 1 grain/gallon (gpg) before the water enters into the reverse osmosis column for further purification. The WaterSoft test strip has a dual detection range. The normal range covers 0, 1, 2, 3, 6, 12 and 18 grains/gal. and is used for measuring the hardness of untreated water. The low levels test range covers 0, 0.2, and 0.5 grain/gallon or 0, 4, 8 ppm and is used for checking the hardness of the post-softener water or RO water.