![]() For quick cleaning process just tip over the tube in container with water, it will make the dredge very efficient for quick. Portable Electric Submersible suction dredge. ![]() the videos labeled Prototype 12volt venturi water pump nozzle. ![]() Sorry the site will not let me attach a picture of the suction nozzle. to find info on how to make dredge suction nozzles and all you find is bits. I have a Honda GX engine driving a Koshin pump which will deliver 240 GPM.īeing a commercial diver I have always used large diameter underwater air lifts supplied with large compressors which move massive amounts of sea bed, I am hoping this dredge will move a decent amount of material. I am thinking of a 4 inch suction pipe supplied from a 2 inch pressure hose same as in the photo but I am wondering will I have to reduce the diameter of the pressure pipe as it enters the suction pipe, I am sure I have read somewhere that the reduction should be approx times 4 so that would make the reduction diameter at 1/2 inch as it joins the suction hose. So I am looking at getting one made from a local blacksmiths at short notice. First post on this very interesting and informative site, I'm looking for a some advice from the experienced dredging people on this site, I am from England and am looking to remove a considerable amount of sand and small pebbles/rocks from the seabed at approx 30ft depth, I was looking at buying a 4 inch suction nozzle from an ebay site based in the USA (photo below) but as this job will be coming up in the next week, the delivery time is too long.
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