The only difference between the Model 625 HD P Hand Dredge and this Model 625 HD P Bilge Style Gold Hand Dredge is the discharge valve system with a bearing mounted pivoting 90 Deg. Elbow. The Model 625 delivers head too, capeable of pumping water up the grade limited to your strength to push water against gravity and itself. and that's with a pinned handle that allows for leveraged pumping. Good lift figures, an adult of average strength gage tested the Model 625 BP at over -10 in/hg, which translates to over 11.3 ft. Pulling the handle can more than double the mechanical force of the water compaired to siphoning thereby improving gold recovery from cracks and crevices. of water with each stroke enabling you to easily pump 25 gallons per minute. With approx. 10 inches of stretch it delivers upwards of 57 cu. Great for working in unstable confined spaces too. Makes for rapid draw downs of standing water laden with "Anchovies" (as in bait tank) silt, sand, rocks and GOLD. High volumne hand powered bilge pump GOLD Hand Dredge. In the background, the Experimental Gravity Trap Concentrator folded for storage and full of black sand concentrate ready to be panned.Ībove, Model 625 HD P Bilge Pump with 36" of 2" inner diameter hose. Pictured top, the Model 625 HD P Gold Hand Dredge in Bilge Pump Styling.
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