I need to add sprinklers to a lawn which is only supplied by a ¾” pipe and I cannot lay down another one. I’m looking for a timer/splitter I can put in series with my pipe which will detect that water is flowing and give 5 minutes to 1 pipe and 5 minutes to the other. Basically I’m trying to make 2 circuits out of 1. The problem is that if I put a standard timer, it’ll have to be totally in-sync with the main timer. Battery operation is desired but not required. Any suggestions would be apprecia...