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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