3 inch prototype dredge nozzle

3 inch prototype dredge nozzle. This is the first dredge nozzle I've ever built. I figured if I was going to build one, I'd try to build the best, highest suction nozzle possible. From researching dredge nozzles, this was supposed to be the best style, the next was a tri-jet, then a standard suction nozzle. From the research I did, I found the last two worked best with a true dredge pump, where a Nozzle like I built worked best with a low pressure, high volume pump. I found this to be true, as raising the RPM/Flow much above 1/2 throttle, it didn't seem to increase the suction. The nozzle can be closed down to virtually "zero" opening or opened up to over a 1/2 inch radial gap. If you're unfamiliar with how one works, this injects water into the cone area from around the outside of the inner 3 inch pipe. The taper of the cone directs the water out the end. In doing this, it creates a venturi suction around the inner 3 inch pipe from 360*. Instead of blasting the inlet water/gravel column like jet log does and blowing the material against the sides of the pipe, this actually sucks to gravel/material to the center of the water column. A side benefit of this is the pipes should last longer as they are not being blasted like a traditional nozzle. Pictures are posted on Facebook at: Gold prospecting equipment traders or also on Backwoods Prospecting, and also East Coast Prospecting. Both are good groups to join and follow. I usually check into those two groups most every day.