This PressureParts Dump Gun 3000PSI/10gpm with 36" Lance (8.710-408.0) is a power washer gun and lance that is rated for 3,000 PSI. It features an easy pull trigger gun with a molded grip lance and threaded inlet and outlet. Dump guns are designed for systems where a bypass or unloader valve is not present in the pressure washer, allowing you to release the trigger without stalling the engine on the pressure washer. They are also useful for the ability to continually push water through the pump which will prevent overheating or accidental tripping of the thermal relief valve due to idling of the machine for extended periods.