The type TW156 can be connected to the manual inlet valve of the respiratory protective device without hand tightening. The clamping jaws grip into the thread and the pressure-tight connection is made within seconds. The TW156 simplifies testing procedures and shortens test times. The quick connector may either be mounted directly to the existing test unit or connected by a hose to the test unit. When used with a hose, the connector must be securely anchored when not in use.