Barnacle Dave said:I must have got my typhoon membrane from Walter before he switched over?
Tap water is 256 TDS range and after the membrane and DI it is zero.
I have the 100 GPD membrane and it is still going strong for over 3 years now.I have 2 TDS meters and both read the same. ZERO.
UnresistibleBlu said:Dave - have you been monitoring the tds reading after the membrane but BEFORE the DI? That reading will help you understand how well your membrane is working.
That is exactly what I said. If I see the DI needing changed sooner then normal then I will know so there is no reason to check the out put of the RO when you keep a close eye on the out put of the DI.UnresistibleBlu said:Dave - that's one way of looking at it. However, if your membrane performance was starting to go bad, and its rejection rate was starting to go down, it would pass more TDS to the resin. If the resin has adequate capacity, you'd continue to get 0 tds out of the DI, but over time you may or may notice that the life span of your resin is decreasing. New resin will produce 0 or 1 ppm tds, but the DI life span will decrease.
Blue