Combining the classic design of the original D-Series regulators with the
latest advances in breathing performance technology, SCUBAPRO engineers have
created a 21st century smooth natural breathing regulator. The D420 features a
brand new balanced valve inside a housing supported by a full metal structure.
Called the Progressive Flow Control Valve, it is able to deliver abundant
airflow for the best breathing performance with a natural smoothness
comparable to what you might experience breathing on the surface. The uniquely
shaped fiberglass-reinforced nylon casing is ultra-durable and allows the LP
hose to be connected on either the right or left side for maximum rigging
flexibility. A new dive/pre-dive system includes a switch on the top of the
casing with a thumb tab for adjusting the direction of airflow right out of
the valve. The highly efficient purge button is a technical jewel based on a
new concept that gives the D420 its unique face. The D420’s long list of
features is sure to enhance any diver’s under water experience.