MK25 D420 Regulator
The Scubapro D420 Regulator is a modern upgrade to their D-Series of 2nd stages that has a better airflow profile compare to standard 2nd stage designs. Smoother airflow and one of the lowest work or breathing ratings make the D420 one of the most natural feeling regulators compared to other 2nd stages.
The Ambidextrous Design means that a technician can swap which side the hose is fitted so you get better hose routing options and the Lower Diaphragm improves the quality of breathing so you don't have to work to open the valve and once the valve is open the Progressive Flow Control Valve allows the air to flow naturally so it feels like you're breathing on the surface.
who's the D420 For?
The D420 is made for any diver that wants a 2nd stage with one of the best breathe qualities on the market. Paired with the Mk25EVO while the D420 may look different to other 2nd stages the D420 is built that way for a reason, and that's airway management. The Lower Diaphragm is about 1" lower than in standard design 2nd stages and that little change in pressure when underwater that makes breathing easier.
Small things on the inside make the whole breathing cycle easier such as winglets that direct exhaled gas naturally to the exhaust valve, which reduces the work of breathing to exhale too.
You'll need an Octo so add on the Scubapro R195 Octo, and a set of gauges so we recommend the Scubapro Double Gauge. If you're happy to assemble your regulators yourself, that's great, but if you're not so sure we're here to do that and we also set up your regs too so they're good to go during our Regulator Assembly and Testing. Also, remember that these regulators don't come in a reg bag so take this opportunity to save some money on our Premium Regulator Case when you buy these regulators.
D420 2nd Stage
◊ NEW. Uniquely shaped fibreglass-reinforced nylon casing carries on the D-Series
heritage with the latest advances in breathing performance technology.
◊ NEW. Air-balanced Progressive Flow Control Valve is able to deliver abundant
airflow with a natural smoothness comparable to breathing on the surface.
◊ NEW. Dive/pre-dive system includes a switch on the top of the case with a thumb
tab for adjusting the direction of airflow right out of the valve.
◊ NEW. Casing design features inner winglets that direct airflow towards the exhaust
valve, creating a dramatic improvement in exhalation effort.
◊ NEW. Diaphragm is located in the lower section of the casing to take advantage of
the pressure gradient in the upright position, making breathing even easier.
◊ Reversible hose attachment allows for either left- or right-side LP hose
connections for maximum rigging flexibility.
◊ Large purge button is easy to reach and press, with or without gloves.
◊ Exhaust tee is compact and efficiently deflects bubbles from the diver’s view while
enhancing ease of exhalation.
◊ Super-flow hose features an oversized bore that allows more air to flow on each
◊ Compact Hi-Flow mouthpiece improves airflow as well as mouth comfort, fitting all
mouth sizes, from largest to smallest.
◊ CE certified according the latest EN250A European Standards for all diving
conditions, including extreme cold water.
◊ Weight (without mouthpiece): 216g.
◊ Airflow at 200bar: 1800 l/min - 64 SCFM.
We offer free tracked UK standard delivery on orders over £50.
Standard UK delivery is £3.95 for orders under £50. You will receive your order 2 - 4 days from the date of despatch. Order by 3pm on a working weekday and we will aim to despatch the same day.
Next Working Day for the UK is £6.95.
We hope you will be completely satisfied with any product purchased from Simply Scuba.
However, you can return it for any reason within 28 days from the date of despatch for a full refund (less postage costs).
Royal Mail tracked return option within the UK for your convenience.