Zone 1- replaced 4 low heads and 1 nozzle Zone 2- installed 2 shrub adaptors with nozzles where rotors were Zone 3- replaced 5 low heads and 1 leaking head Zone 4- replaced 1 low head Zone 5- no problems Zone 6- replaced 2 low heads and 1 nozzle Zone 7- no problems Zone 8- replaced 3 low heads, moved 1 head out from behind bushes, replaced 1 nozzle, installed 2 new heads where new concrete was installed