SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

Hello, as my subject header sez, last drip emitter on a line seems to have low pressure and doesn't shoot out enough water. Below I'll lay out a few details:
- My mainline is 1/2" flex and my feeder lines are 1/4".
- All the rest of the drip emitters work fine
- I have a really good filter system, so clogging isn't a problem (and I've double checked the line)
- I've got my drip system broken down into 3 zones (but usually run all at once). I have shut off the other 2 zones and
just ran the zone with the problem end drip emitter (should be plenty of water and pressure, right?), still same
problem
- When I remove drip emitter, plenty of water that seems to have plenty of pressure squirts out 1/4" feeder line
Is there some type of "air lock" effecting the last drip emitter on the line? This one has me boggled. THNX

title should of been "ISN'T" shooting out much water