wrong valve selected, flow too low - replace with correct size valve for flow.
	valve diaphragm is clogged - clean or replace diaphragm
	solenoid faulty or wires severed - check wiring, repair or replace solenoid.

Emission device has uneven or no flow

	upstream of emission device - check for breaks or repair
	filter clogged or inadequate - check, clean or replace filter
	emission device clogged or faulty - replace emission device
	pressure too high or too low - check pressure regulation
	too many emission devices on one line or line sized improperly for flow - check and correct

	fitting improperly installed or wrong fitting - check and replace
	pressure too high - check pressure regulation

Emission devices come loose from tubing

	emission device installed improperly - check and replace
	pressure too high - check pressure regulation
	faulty or worn hole punch - check punch tip and replace bad section of tubing

Plants appear stressed

	emission device at plant is clogged -  clean or replace emission device
	filter is clogged and preventing flow - clean and/or replace filter
	brake in line upstream of emitter  - check for breaks and repair
	run time inadequate for plant and/or time of year - recalculate water requirement        and re-schedule
	controller faulty or turned off - check controller and reset, repair or replace