How I built a recirculating sluice box for gold prospecting
I built the cradle, again from scrap wood. I had to buy a piece of hose and a few PVC fittings. The spray bar at the top of the sluice is a short piece of PVC pipe with a lot of holes drilled in it. I used a valve to control the water flow. Again, not much effort, and not enough forethought went into it.