The Apeks XTX200 Flagship Regulator is the ultra-performance FSR first stage and factory integrated XTX200 second stage together with an Apeks brand double braided flex {30 in | 76 cm} hose. Offering excellent cold water tolerance to {36°F | 2°C}, the Nitrox Ready set is EN250 certified to {660 fsw | 200 msw} depth.

• Apeks FSR flagship enviro-sealed first stage with choice of DIN or native Yoke connector fitting
• Apeks XTX200 adjustable second stage and wide exhaust tee plus additional user changeable compact exhaust tee
• Apeks Comfo-bite™ premium mouthpiece greatly reduces jaw fatigue
• Apeks brand {30 in | 76 cm} double braided flex low-pressure regulator hose
• Apeks factory integrated, the first and second stage have matching serial numbers
• Apeks environmentally conscious factory cardboard packaging with hardcopy Apeks Regulator Owner's Manual

The Apeks flagship FSR first stage is a unique over-balanced, diaphragm design - as the diver descends, the over-balancing feature allows the intermediate pressure gas in the hose to increase at a rate faster than ambient resulting in superb performance at extreme depths. The forged and polished chrome plated body has two standard high pressure 7/16-inch fixed angle ports plus four standard high-flow low pressure 3/8-inch fixed angle ports in an orientation that Apeks describes as being optimum for streamlined hose routing. The beefy body functions as a heat sink together with an enviro-seal keeps water out of the main spring chamber thus preventing ice buildup and keeping silt and contamination out. The FSR is available in choice of DIN (with optional DIN-to-Yoke spin-on adapter) or native Yoke connector fitting and is Nitrox Ready.

Unique among the Apeks XTX series first stages, only the FSR has a removable ARCAP high-pressure seat crown. ARCAP is a high-tech metal alloy with very high tensile strength and is resistant to the effects of low temperatures and temperature change. The insulation from the surrounding environment provided by the beefy forged body, together with the replaceable HP seat made of the ARCAP alloy, means the FSR offers exceptional tolerance for cold water. For diving in freezing cold water, an optional Apeks 5th Port Upgrade that also includes an additional heat sink is available.

The Apeks XTX200 second stage is a pneumatically-balanced downstream design that results in smooth, easy breathing. The purge button is large and easy to operate and features two-step progressive operation. Press the purge on the side for a lower flow rate, useful where more control is required such as filling lift bags, then press in the center for the full effect of the purge such as when clearing water. The large venturi lever has a soft touch rubber grip, which makes it easier to locate and use. A heat exchanger surrounding the valve mechanism dissipates the cold caused by gas expansion while drawing in and retaining ambient heat.

The Apeks XTX200 second stage is black color with a polished chrome ring on the body cover and an easy-to-grip opening effort user adjustment knob that includes a hex key micro-adjustment feature. The popular Apeks Comfo-bite™ premium mouthpiece greatly reduces jaw fatigue. The XTX second stage design also supports an innovative user changeable exhaust tee. This system gives the diver the ability to change between a narrow exhaust tee that makes the second stage more compact and a wide exhaust tee that offers the best bubble dispersion; both are included with the XTX200. For diving in freezing cold water, an optional Apeks Coldwater Lipshield and an optional Apeks Free-flow Control Device are available.