The Mk11 First Stage Regulator is the perfect choice for the recreational diver who wants the advantage of a diaphragm first stage for use in temperate waters. Diaphragm-based first stages are environmentally sealed so that water cannot enter the inner mechanism. Bearing in mind that regulators generate temperatures as low as 22-degree F (-5.5-degree C) due to the incredibly fast-moving air and the pressure drop involved, it is imperative that sensitive moving metal parts avoid contact with extremely cold water or debris. Therefore, diaphragm first stages have been the favored choice of cold-water divers and those working in contaminated or muddy water. Scubapro diaphragm first stages feature balanced technology and are packed with patented features resulting in ultra-fast flow to the second stage on demand and a fantastic overall performance.

The MK11 first stage's streamline body is constructed of machined marine-grade chromed brass. The MK11 has a balanced diaphragm to offer you peace of mind with its smooth breathing mechanisms and maximum performance that don't diminish as your tank's air pressure changes. This first stage comes standard with the Thermal Insulating System (TIS), which keeps your first stage from freezing up and malfunctioning in cold water conditions. Additionally, its over-balanced diaphragm first stage design gives you better breathing performance at greater depths. First-Stage Regulator is equipped with two 7/16" threaded HP and four 3/8" threaded LP Ports. Two of the LP Ports are High Flow Ports (HFP) for easier breathing on demanding dives.

The C370 is the newest addition to Scubapro's family of high performance second stages. Based on the compact C350 case, the new C370 brings forth the best features of its predecessor while adding a balanced valve to its design. A brand-new exhaust tee based on the S620 Ti's design contributes to better work of breathing (a 10% improvement over the C350). A compact hi-flow mouthpiece, also borrowed from the S620 Ti due to positive feedback, has been added to increase both airflow and mouth comfort. Fully adjustable, the C370 includes a user adjustable inhalation effort control knob along with a small coaxial dive/pre-dive lever. The new air balanced C370 is lightweight, breathes easy, offers full user controls and delivers effortless airflow.

Air-balanced valve smoothest out the inhalation effort at varying depths and supply pressures. Compact, rugged fiberglass-reinforced nylon casing takes up little space in a dive bag. Stainless steel frame on the front cover adds the Scubapro C-Series signature. New poppet and lever allow the design to maintain the same overall size as the C350. Large purge button is easy to activate, even wearing thick gloves. Super-flow hose features an oversized bore that allows more air to flow on each inhalation. Compact Hi-Flow mouthpiece improves airflow as well as mouth comfort, fitting all mouth sizes, from smallest to largest. Regulator comes with a 3/8" threaded hose, weighs 31 oz. (881g) and comes with an owner's manual.

Scubapro MK11/C370 Regulator Features