Years ago when the EZIO8T was all there was in the EZIOxx family I hooked up 24V AC relays to the Triacs to control my garage. Seems like they could drive zone values as well.
Not sure if this falls into the obvious category or not. The EZFlora can assign one of the zones to control a pump relay such that if any valve is open, the pump relay is energized. I need that type of function because I have a dedicated irrigation pump that pulls water from a lake only when actually irrigating. In addition EZFlora has 4 watering programs. Would think the EZSrve could be set up with timers and macros to accomplish the same thing.