The Nozzle Holder Assembly attaches to the NH1-A fitting at the end of the 3/4″ blast hose. This assembly allows the operator to shut off the airflow at the end of the blast hose.
The Nozzle Holder Assembly should not be used to throttle or reduce air flow. Doing so will damage the ball valve. This is designed for intermittent usage. Continuously opening and closing of the ball valve will result in rapid wear.