Model 625 HD 
also available: Model 625 HD P
Click Here M625 and M2125 GOLD Nugget YouTube Video
With a single elongation stroke of the pump, this hand powered suction separator dredge is capeable of creating enormous suction at the nozzle end due to the sealed no leaks construction. During the pump down phase that dischrges the slurry, the sand, gravel, and gold that was on the way up the hose or pipe, looses momentum and might begin to fall back, but a rapid succession of pump strokes will keep it coming virtually walking the larger heavier values up, up and away and into the pump much like a construction site or trash pump. Pulling the handle can more than double the mechanical force of the water compaired to siphoning thereby improving gold recovery from cracks and crevices.
The Model 625 Hand Dredge, works much like a typical recreational suction dredge, only the suction is Immediate Vacuum Response (IVR) and not dependent upon a power jet venturi's impeller produced siphoning vacuum that's driven by the mechanical force of an artificial gravity (see hydraulic mining monitor) type water pressure forced angularly into the dredge hose cavity. The convoluted cylinder bellows "HG Power Plant" is reinforced from inside and out making the operation more like a "rocking" piston pump. 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. Effortless operation makes all day GOLD hand dredging possible. Best of all, it's ported to easily pass 1 1/2" solids for when your in a FEVERED hurry, or accepts the large seived nozzle for processing massive amounts of pre-classified material.
The Model 625 Crevice Dredge, is the compact version of the Model 625 Hand Dredge, it too is ported and will easily pass 1 1/2" cobbles, but is equipped instead with a quickly detachable close profile catchment system.
