![]() ![]() A 5" dredge may have a nozzle opening of 4" for this reason. However, nozzles are used on dredges which restrict the intake to a size smaller than the inside diameter to help prevent clogs. ![]() So a 5" dredge has a main suction hose with a 5" inside diameter. Manufacturers rate suction dredges by the inside diameter of the main suction hose. Floats are also needed because there is rarely a nice gravel bar in just the right place to set up a dredge without floats. Every inch of vertical lift above the surface of the water robs power/suction from the system. This is because a dredge has just enough power to lift water and gravel to just above the surface of the water. Dredges almost always need to be mounted on a set of floats. A sluice box works because gold is 15 times heavier than sand and gravel and so is easily trapped by the riffles and carpet in the sluice box. Material is transported from underwater to the surface and run through a sluice box to capture the gold. Prospecting Supplies Australia purchases in bulk and holds stock so that retail stores can purchase from the company in small quantities and thus avoid importing or wholesaling themselves.A suction gold dredge is basically an underwater vacuum cleaner. ![]() Some of the agency lines the company supplies are exclusive and some are not but as they are purchased in bulk and the company has extensive experience in importing and wholesaling and in the Australia/USA free trade agreement, products are sourced at very competitive rates and will pass these rates on to clients. Prospecting Supplies sources and supplies prospecting and small mining products and accessories from local and overseas suppliers and manufacturers as well as manufacturing some lines ourselves. ![]() Prospecting Supplies Australia is a business created by Geoff Strang who was the manager of Miners Den Melbourne for over ten years up until it was sold in September 2010. P rospecting Supplies is the first and still the only prospecting and small mining equipment wholesale distributor in Australia. ![]()
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