The question is how to unclog clogs in drip distribution tubing, or as far as that goes any line including poly and pvc. I've come up against the first big time clog in a drip system that is giving me a tough time. End caps are open on the line but no water - I mean nada - makes it through. Anyone else have this happen? I'm going to try adapting over a garden hose to fit on the end cap and back flushing the line, and if that doesn't work then who knows... maybe try fishing a long wire up the tubing, Draino, Roto Rooter?