Vincerama2
Supporting Member
I’m not sure.
my understanding is that the waste water does go through the membrane a little as well. If I’m wrong I definitely want to know.
It's funny that we call RO/DI waste water "Waste". When really it is water that has gone through all your prefilters. So although it does contain a higher concentration of whatever your RO membrane is rejecting, it also starts off a lot cleaner than whatever is coming out of your pipes.
V