Originally Posted by Dennistnt
I put adjustable nozzles on all of the heads that were halfway up and closed them off. Turned on the zone and three more heads popped up!! Closed adjustable nozzles on these too and turned on the zone again. Walked to one of the last three heads that popped up and one was barely attached to the nipple in the bottom. Problem solved!!
Thanks for everyone's advice!
Thanks for the update, that is all the pay we get.