Inspired by this thread I decided to see what happens to TDS after it has gone through the sediment and carbon filters. The idea was to see if guys that can half justify using DI systems with no RO could benefit from using carbon and sediment filters...
Well my TDS prior to any filtering was 247, after filtering it was 246.
So no, my thoughts that you might be able to use carbon and sediment filters prior to the DI and cut cost were wrong. But thought I would post it anyway just incase you were wondering.