The (parallel 3-way) manifold is attached to the single limb
breathing circuit to regulate the expiratory valve. The control
line from the ventilator controls the opening of the valve to
enable air to flow in and out accordingly. This line
intermittently provides the pressure needed to close the
expiratory valve during inspiration, which blocks gas outflow
during the application of inspiratory positive pressure.
The 3-Way Manifold comes with a hanger that can be
attached to a hanger arm to help position or keep the
breathing circuit in place.