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The Dump Gun

A dump gun avoids the pressure spike by simply re-routing the flow of water at the gun.

The dump gun design avoids the need for an unloader by simply diverting the flow around the pressure nozzle and to the atmosphere instead of back to the pump. In other words, it directs the flow of water to reduce pressure of the outflow rather than stopping it all together. Instead of flowing through the pressure nozzle, water flows through a larger opening at the end of the lance. The dump gun simply chooses whether water flows through the larger, low-pressure orifice or through the smaller, high-pressure nozzle.

In some cases the flow is diverted to a tube surrounding a smaller tube the nozzle is mounted on. Other dump guns use double-barreled wands. In appearance the dump gun looks very similar to the trigger gun. With a dump gun, releasing the trigger relieves the pressure. To stop the flow, the machine must be turned off.

Dump Gun Benefits