Both systems are way over priced. If you ever haqve to have a kinetico softner repaired hang onto your wallet...I'n not sure about rainsoft. A good (computer/gallonage)initiated water softener "Fleck or Autotrol" control valved unit should not run higher than $1500.00. The...
If your di h2o is 15 megohm or higher...it is dead 7.0 ph. Try pinching some salt into your beaker before running sample of di h2o. The problem with measuring di h2o is the lack of ions...co2 is immediately grabbed lowering ph. Typical ph of 5 is measured fairly soon after grabing sample.