We are installing very large water softeners to provide makeup to our water systems in the plant, and are wondering if there are adverse effects to using existing water makeup piping from the softener to the tanks that are copper. We do not intend on running a dangerously low PH, so are there other factors to consider making this decision?
Answer: No need to replace the piping, you will be fine. Actually, water processed with the water softeners will act to remove any existing build-up (scale also called hardness) from the piping. Softened water contains has a lower level of magnesium and calcium, and any of this material that has built-up on the piping will slowly dissolve back into the softened water.