*PLUMBERSSTOCK EXPERT* responded:
Hi! Sorry to hear about your problem with your Aquaburst 30EDF 3/4" Adjustable Brass Impact Sprinkler. Usually, the cause of this are use of lubricants (other than water), low water pressure, foreign materials in irrigation water that cause clogging or water deposits build up that cause friction, and excessive damage or wearing to the sprinkler parts. Try to disassemble your sprinkler and clean the unit thoroughly. You may also need to check for sources of reduction in water pressure. You might want to go over pages 2 and 3 of this troubleshooting guide for more detailed remedies to fix your problem. Should you have further questions, please let us know. If you need assistance in creating an efficient irrigation system for your lawn and garden, PlumbersStock is offering that for FREE! Simply visit our Sprinkler Design Center to get started.