These are variations on other equipment but instead of relying on an external water source, they use a recirculating water system. Water is better at separating out gold than dry methods but also requires more equipment and time to set up. Rockers, high bankers, trommels and any other equipment that use water for separation can be altered to recirculate the water. These are very common in desert areas where water is scarce. Several club members have these and many are either handmade or altered after purchase. See specific types of equipment for examples.
