My R/O system is coming in today and I'm still wondering about something. The system I got coming today is a Coralife Pure-Flo II 50 gpd 3-stage system. We're not going to have a bladder tank or faucet at first, just the system. I don't know what all comes with it, so I bought 2 JG 1/4" valves for the system, one for the water supply line, and the other for the product water line. I'm going to have this hooked up underneath the kitchen sink. I already have a T with a reducer bushing and the JG valve for the water supply line hooked up underneath of the sink. When I want to turn the system off, and to ensure that the membrane doesn't go dry; do I turn off the product valve first, then the supply line valve? Or do I turn both valves off in reverse order, or at the same time?
