Geoff, after all the softeners, Filters and the RO some people thought it would be wise to incorporate a UV filtration system to the output of the RO, thus killing any residual bacteria but creating endotoxins. You can still see diagrams on google with this type of filtration.
Boss Neil kindly explain further why you mention that UV filtration can cause endotoxins.
For curiuosity, are UV light that installed at the end of the R.O. system and UV filtration that you mention are the same?
