I just installed my Rchio system on a systemthatisabout 12 years old. I also recently had to have one of my valves replaced. Because of the age of my valves they can take 30 seconds to a full minute to completely close. The repairman asked if I had the ability to set a short delay between stations to allow old valves to properly close on one station before the next station starts. Currently, Rachio doesn't have the capability but I think you should add to the advanced features.