Scubapro S270 Regulator - Second Stage Only

Follow the interval in your regulator's manual, since manufacturers commonly specify an annual inspection or a set number of dives and many warranties depend on it. A regulator is life-support equipment, so service belongs with a factory-trained technician rather than being attempted at home. Have it looked at sooner than scheduled if you notice increased breathing effort, free-flow, bubbles, or water in the second stage.

Make sure the dust cap is dry and firmly seated over the first-stage inlet before the regulator goes anywhere near water, because water inside the first stage is the leading cause of internal corrosion. Rinse in fresh water without pressing the purge button, since purging while depressurized can draw water back into the second stage. Shake out the water and hang it to dry with the hoses in wide, gentle loops rather than tight bends.

Regulators travel well and are usually best carried in hand luggage where they will not be crushed or lost. A regulator holds no gas of its own, so there is nothing inherently problematic about it on an aircraft, though the airline and security screeners always have the final say. Pack it dry with the dust cap in place, in a padded regulator bag or wrapped in soft gear.

Many modern regulators are supplied as suitable for nitrox mixes up to 40 percent oxygen, which is the widely used recreational industry standard, while anything above that requires dedicated oxygen-clean equipment and procedures. Confirm what your specific regulator's manual states, and follow your nitrox training and your fill station's requirements. Never assume a regulator is oxygen-service clean simply because it looks clean or is new.

A yoke (A-clamp) fitting clamps over the tank valve and is the most common connection across much of the recreational world, while a DIN fitting screws into the valve and is standard in much of Europe and in technical diving. DIN captures the o-ring inside the threads, which many divers consider more secure, but yoke is often what rental cylinders provide. Adapters exist in both directions, so check what is used where you dive before deciding.

The octopus is your backup second stage, carried so you can share air with a buddy who is out of gas, or breathe from it yourself if your primary fails or free-flows. It is normally on a longer, brightly colored hose so it is easy to find and hand over under stress. Secure it in the triangle between your chin and the bottom of your rib cage so it is instantly accessible and not dragging through sand or coral.

Store it fully dry, out of sunlight, with the dust cap in place and the hoses in wide loops rather than tightly coiled. Avoid hanging it by the second stages for long periods, which stresses the hose fittings; laying it flat in a padded bag or hanging it by the first stage is kinder. If it has sat unused for a long stretch, have it checked before your next trip rather than assuming it is ready to dive.

No. Scubapro lists the S270 as a non-adjustable second stage, so there is no inhalation-effort knob on the body. What you do get is an adjustable VIVA (Venturi) mechanism with a dive/predive switch that can be operated with thick gloves, which tunes airflow assistance and helps prevent unwanted freeflow at the surface. The air-balanced valve handles the rest, keeping delivery consistent as depth and tank pressure change.

Scubapro supplies the S270 second stage in regulator systems built on the MK11 EVO first stage (system part number 12.179.000), the MK11 DIN 300 first stage and the MK2 Evo first stage, and it is also offered as an S270 octopus in a system with the MK25 EVO/S620 Ti. Since this listing is the second stage only, call 888-701-4017 if you want your existing first stage and hose checked.

Yes. The S270 uses a technopolymer barrel whose surface resists ice-crystal formation, which Scubapro specifies for extreme cold water diving, and the dive/predive switch can be worked while wearing thick gloves. The complete MK11 EVO/S270 system is CE certified to the latest EN250A European standards for all diving conditions including extreme cold water.

This SKU (11.270.000) is the S270 second stage itself, and Scubapro's specifications list the mouthpiece as included. Scubapro does not publish a separate package contents list for the second-stage-only version, so if you need to confirm whether a hose is supplied for your setup, contact DiveCatalog.com at 888-701-4017 before ordering and we will confirm the configuration.