I had installed a water conditioning system in a home two months ago. The home never had water treatment and the water heater is about 20 years old. I tested the treated water yesterday and the cold water had 0 Hardness and a TDS of 160. However the hot water had 4 grains of hardness and a TDS was 380. This proves that clean soft water will dissolve Hardness from inside of pipes and plumbing.
