Two test tonight. First one with a short 3ft piece of 1/2 PVC .

Then a test with a 7 foot piece of 3/4 PVC.

At 7ft I get about a foot above the pipe, and if I put an ell on it, I get a 3 foot stream before it goes crazy and falls over.
I think this might work if I can make sure it stays unclogged.