I recently had a lightning strike that took out My control box and #4 zone valve which left the zone on and caused Me to have to shut the water off to the system to stop it. After replacing the box, everything works fine except for zone 4 which of course runs all the time. I was hoping to find a new valve and simply switch solenoids instead of digging up the old one but the solenoids I have found have a fine thread and My 9 year old one has course (acme) threads with a red o-ring. Are parts for these still available or do I need to start digging in a tough area? All comments and thoughts appreciated.