One of the tubes is for turning the water on an off1. Why can't I use my current drinking water faucet? The RO one is complicated with 3 tubes coming out and I don't like the look as much. I don't understand why it needs so many tubes just to dispense water.
The other 2 are for the drain which includes an air gap in your faucet.
The flushing is a desireable feature to flush the membraine clean2. Why doesn't the new RO unit include a backflush option? Does it need it?
To help maintain purity and good taste.3. What is the purpose of the "postfilter?" It seems like it should come out of the RO membrane pure enough...why one more filter?