Hoping to get a bit of insight from the forum. I just installed my new Rachio and configured everything. I have a pretty simple system with only 4 zones. Tonight the schedule ran and on one of my zones I hear a nasty rattling that seems to continue as long as that zone is under water. When the Rachio shuts down the zone the pitch of the rattle gets higher and then stops once the valve is closed. I’m new to lawn irrigation, is this hammering? I don’t remember hearing this when I ran the old controller, but in all honesty before the Rachio I wasn’t paying as much attention.