henderson pump

  1. How To Make A Monster 4" Manual Dredge Suction Pump

    Here's the other manual hand dredge video describing how I've made a Monster 4" suction pump which will collect twice as much material as the standard 2 1/2" pump per draw. There's a couple of bits just out of shot when I point to them, I underestimated it's size when filming haha but it can all...