The power jet is the critical component in a modern suction dredge that creates the suction that does all the work transporting material from a stream bottom into a sluice box. A pump is attached to a side input (jet log) on the main jet tube. High pressure water fed into the jet log creates suction in the much larger main tube. This allows a relatively small pump to power a dredge hose sucking up much larger rocks, with the added benefit that no rocks pass through the pump itself. Most modern power jets are oversized to help prevent clogging and are equipped with a sleeve that fits over the end of the hose. This sleeve (the bullet) plugs into the quick release coupler on the intake end of the power jet. See the attached images for details. Older style straight pipe power jets are still made and sold. These are measured as an outside dimeter pipe to fit into a hose. These days they are normally employed as inline booster jets for extra long or deep dredging projects.
AMDS stocks a selection of power jets, but due to the large variety of sizes and types available only very common sizes are normally on hand. Be sure to Contact Us well in advance in case a jet needs to be special ordered for you. Waiting until the last moment will often incur extra shipping costs to Alaska so do plan ahead.