Hi all, I am a small contract manufacturer located in San Jose. We use OA flux and water soluble solderpaste for wave-solder and reflow, repectively. I currently use city water for cleaning(approximately 500 gal/day). I have not run into any contamination problems on the PCBs from this process yet. Is there a need to switch to DI? If so, what are some of the pros and cons of using DI water?( cost, effectiveness) Also, if I do need to change, what is the best way to setup a system? Our current in-line cleaner consists of two wash chambers, rinse chamber, and a final rinse chamber that can utilize different source of water from the previous. Any information or suggestions would be greatly appreciated. Tom