I have attached some photos of the twist to clean filter, iron filter, and softener that I purchased from the Clean Water Store. Thank you all for the great customer service. The system went together smoothly and is working well. The drinking water from the R.O. unit is just what my wife and I were craving. We had become partial to distiller water, but the R.O. water is equally as satisfying. I may be in touch in the near future regarding some fine tuning questions. Thanks again!