![]() Best of all, it's ported to effortlessly pass 1 1/2" diameter cobbles, or attach the large 3 1/2" inner diameter, 1/2" mesh seive nozzle for suctioning and pumping massive amounts of pre-classified dredge material with fine gold into a free flowing sluice or a side loading bucket. The convoluted cylinder bellows "HG Power Plant" is reinforced from inside and out making the operation more like a "rocking" piston pump. See: "hydraulic mining monitor") type water pressure that's forced angularly into the dredge hose cavity. The Model 625 Hand Dredge, works much like a typical motorized recreational suction dredge, only the suction is Immediate Vacuum Response (IVR) and not dependent upon a power jet venturi and impeller produced siphoning vacuum, (vacuum that's driven by the mechanical force of gravity. ![]() Model 625 HD YouTube Description of Components Model 625 HD GOLD Prospecting Hand Dredge
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