[pHaestus]

I should add that I remain skeptical of comments that the #5 nozzle produces a true "cascade effect" because as I understand it the secondary impingement (straw in a cup) was really the only reason the Cascade did better than WW type designs. I seem to recall JayDee and Volenti having less than stellar results in blocks that looked similar but that didn't use the straw in a cup design. I have to wonder how the #5 will compare to the other thinner oval inlet nozzles that increase water velocity.

Really the RBX and WW and Cascade are pretty different in function and so the nozzle testing is interesting.*

*maybe only to testers and wb designers though