Many power jets are smaller in diameter than the inside of the suction hose. These are generally caused for two reasons (in addition to sucking up the wrong rocks). Just like there is a system of knowing how to avoid plug-ups, there is also a system for removing plug-ups quickly. Generally, we avoid sucking up large flat rocks altogether. So the round rock can catch up and possibly cause the flat rock to turn and lodge. The reason for this is because the round rock, having more surface area, will move up the hose faster than the flat rock. Sucking up a larger round rock, just after a long-thin rock, or just after a medium-sized flat rock, is just asking for a plug-up. This way, after a while, you gain an understanding of which type of rocks and combinations to avoid putting through the nozzle.įor the most part, the rocks to avoid sucking up are those that are just large enough to fit in the nozzle that are sharp and angular, or that are shaped in such a way that if turned sideways, they could possibly lodge in the suction hose or jet.
When possible, an experienced gold dredger will watch to see what kind of rocks caused a plug-up every time he or she will get one. Everybody that dredges must get through this part of the learning curve. A plug-up is caused when a single rock, or a combination of rocks, lodge in the suction hose or power jet, which then prevent further material from being sucked up.īeginners are especially plagued with many, many plug-ups, because they have not yet learned which types of rocks, or which combinations of rocks, to avoid sucking up the nozzle. We offer many sizes and styles to choose from and maintain a good supply of various size hose clamps and couplings.One of the main impediments to production in gold dredging is the occurrence of plug-ups in the power jet and/or suction hose. We stock suction hoses for dredging, pressure hoses for powering dredges, and layflat hoses for highbanking use.
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