twfsa wrote:

I ahve noticed that the sprinkler heads (Rainbird) are sticking in the up
position and fail to retract after the system shuts off.

They are 11 years old is it time to replace them as needed, or is there a
fix?

Thanks

Tom
Replace them, its not that expensive per head and you can (probably) use the
old nozzles. Should be able to just unscrew the old one from the inground
case, swap the nozzle to the new one and plop the new one back in the
inground case - no digging needed. Then just adjust the spray pattern.
Check each zone for proper operation and voila! you should be back in
business with a like new system
Eric