"twfsa" wrote in message
news:bbe9f.21743$v_5.16129@dukeread07...
I ahve noticed that the sprinkler heads (Rainbird) are
sticking in the up
position and fail to retract after the system shuts off.


I've had good luck just clearing away the grass that grows
tightly around the heads. Then turn the system on, and
repeatedly push the offending heads down multiple times to
help wash away the dirt that makes them stick.

Bob