Well, I've gotten my new membrane and installed. Tapwater was 475ppm, RO
is now 40ppm, DI
is 2ppm dropping. I'm going to let the system go for a couple of days and see if flushing won't hopefully lower some more.
On a side note, I just want to say how impressed I am with the service from airwaterice.com . They sent me new membrane right away, and even now while my TDS
has dropped, they are still telling me it should be lower and may send a whole new unit. They even respond to e-mails Sat nights and Sundays..very impressed.