![]() I will try to load 2 photos showing what I came up with. I used alloy for weight reasons, but also because it was what I had on hand. I lined up the new 3/4 inch jet to be slightly pointing downward but up the center of the pipe - so the water jet would hit the bottom of the pipe about 3 or 4 feet up. ![]() Mostly because my hand wouldn't fit up past the nozzle restriction. The old shop bought venturi had worn totally out and was very hard to get jammed rocks out of. My pump is a 5 hp Honda driving an Onga pump - a factory built pump/motor unit available here in NZ. The last one was four inch and I used a 3/4 inch jet with a flare out to the 1 1/2 inch supply. In a good creek power jet, In puddle jumping use the suction nozzle.Hi there, I have made a few suction venturi nozzles over the years, as I couldn't find or couldn't afford store bought. The idea is that if you are using a jet flare and should you pop the hose out of the water and lose prime the pressure jet may blast material out of the box, find the angle in which the jet blows over the sluice should somthing bad like that happen. This may be different than yours, I'm not sure if you have a crashbox or a jet flare. The jet inlet position doesn't matter too much on my dredge as I still use the old crashbox style header. The jet log will get better gas mileage than a suction nozzle and provide better suction should you keep it floating on the pontoons. Figure out what rocks to throw away and not hog the nozzle and you will do well. The nozzle restriction will rob your production, fill with small rocks and reduce the flow over the box, the gravels compact, clear the nozzle, and your boxes scour. Don't put any kind of restriction on the nozzle! It's all bad! Get a snorkel and mask and look what is going up the nozzle.
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