We recently moved into a home with an irrigation system with 11 zones. We had a service come out and get everthing turned up (after winter) and make sure all was in working order. They did replace a valve and/or solenoid but otherwise everything looked good and we've been running it for the past few months. The other day I noticed the water pressure in the shower was low. Upon investigation I could hear water running through the irrigation supply line even though the system was off (it had finis...
