In the course of "fixing a leak" in my R.O.W.F.S., I visited Lowes. Mine appeared only slightly different than the "Krystal Pure" model there, and both look like they were made on different days in the same factory, so I purchased the corresponding filters and a membrane. $70-ouch.
I noticed that I replaced a 75 gallon/day (almost doubly more expensive) membrane with a more-conventional 24 gallon/day membrane (certified by the "Water Quality Association, no less). Inscribed on the replacement membrane's box: "Fit's most standard Reverse Osmosis Systems", and "cleaner ice cubes!" --the former was an important selling point for me.
Volume of water is not an issue, since we probably don't draw 1/2 gallon/day. The R.O.W.F.S. appears to function and no longer leaks. My primary question is: Should I be concerned about the membrane substitution?
As this is a 5-part purifier (rather than a 4-part purifier), there is an additional 2" long "inline filter" (with '600' marked on it in black letters), which the water travels through last I think, which I'll probably order from the manufacturer. Any further info about it?
I can no longer say I am completely ignorant of my R.O.W.F.S.... what a pain! ; ) Anyone actually replacing all of these filters according to the calendar? Smart to have some new O-rings handy...
Bill