Rain Bird 5000 Rotor Replacement: Hole Fills With Water Then Drains

Replaced Rain Bird 5000 rotor (broken cover). New head works, but 2" water fills hole around it, stops rising. Overnight hole dry. Restart: same thing. Leak, pressure bleed, or reinstall?

Likely Thread Leak or Debris

Matt: "I sound to me as if you have a leak at the threads of the sprinkler. You may want to dig-up the sprinkler and watch where the water is coming from. The other possibility is, in the process of changing the sprinkler you allowed a little soil into the riser and or threads. This soil inside the sprinkler can make the seal leak and cause the same problem. If this is the case you would see water running out of the top of the sprinkler."

Water filling hole then stopping = leak at connection (threads) that saturates surrounding soil until equilibrium. Overnight drainage = soil percolation. Not a pressure bleed feature.