OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Two master valves from different sources? › Reply To: Two master valves from different sources? April 15, 2015 at 10:09 pm #36739 RayKeymaster @Greg, OK, this seems to be the first request to support a station triggering both masters. We were about to make UI changes to support two master stations, so it’s good to know that.