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I also notice that the RO water from the first membrane isn't going into the DI.
I've tried a few ways of doing my RO setup. They said that by running the RO membranes in a chain, it increases GPD, but I couldn't really tell any difference. I just run them parallel (like you have your ones on the right), so that my water all goes through sediment filters, then splits to the RO intake side, then all the waste lines merge and go to a drain.
COrrecct. I see it now.. I use all three of those for sediment filteers...but then again, counting all containers in my setup, I have 12.he has two di cartridges in the picture, one attached to the unit and another separate di for the secondary ro membranes..
I'm jealous. I have only nine....but then again, counting all containers in my setup, I have 12.
I disagree. Sediment filters will offer little to no pressure drop, unless you pack them tightly. In other words, pressure will equal out on both sides of the sediment filter, because your biggest restriction is at the membrane. You can bottleneck anything, and pressure will equalize, but once you pass your largest restriction, pressure will drop. If your sediment filter is your largest restriction, something's wrong.More is not better with RO/DI. Everything you add in front of the RO membrane has an associated headloss or pressure drop which reduces the membrane efficiency or rejection rate. The idea is to have as few high quality filters as possible for the job at hand, this will give you the moste efficient, cost effective system. Dual DI on the other hand is downstream of the membrane and a good investment for most.