The Halcyon H-50D 1st Stage Regulator is a high performance diaphragm design that is fully sealed and purpose built for harsh conditions like ice or environmentally contaminated environments.
Diaphragm first stages are historically popular with cold water divers and the H-50D was engineered for extreme conditions.
The unsurpassed performance of the Halcyon H-75P First Stage regulator results from a balanced piston design which delivers significantly more gas than any other design while leaving performance completely unaffected by changing tank pressure.
Compact suit inflation first stage with over-pressure relief valve. Regulator has one LP port for inflator hose and is for suit inflation only.
Scubapro MK11 First Stage is a perfect choice for a traveling diver who requires a light weight first stage. Machined marine grade chrome plated brass body. Four 3/8 UNF low pressure ports and two high pressure ports.
The Scubapro MK17 EVO is Scubapro's premium high performance balanced diaphragm first stage. Engineered specifically for cold water and harsh environments, its internal components are completely sealed off from the elements so neither water nor pollution can get inside the chrome-plated marine grade brass body to foul the mechanism.
The Scubapro MK2 EVO First Stage Regulator is a totally evolved classic downstream piston first stage, now more of a workhorse than ever. With increased breathing sensitivity and better airflow, freezing resistance is dramatically increased. 50% increase in freezing resistance, 15% increase in airflow and even a smaller body than the famous original MK2.
With the introduction of the new patent-pending Extended Thermal Insulating System (XTIS), the Scubapro MK25 EVO first stage lets you enjoy an ultra-fast breathing response, instant delivery of air on demand, great sensitivity and extra-high airflow - regardless of how cold the water is.
High quality First Stage ideal for stage regulator. The Apeks DS1 First Stage is compact, environmentally sealed with one 3/8 medium pressure port and one high pressure port.
The Apeks DS4 First Stage is a work horse with years of tested and proven experience now preferred by the most demanding technical divers. Ideal for twinset configuration.
Add an additional fifth port to your Apeks DST with the Apeks DST 5th Port Turret Upgrade Kit. The picture shows a hose attached to the new port positioned at the turret end of the Dry Sealed Turret (DST) 1st stage. The Apeks conversion kit is only suitable for the DST 1st stage and cannot be used on other Apeks 1st stages.
The Apeks DST first stage regulator is ideal for stage cylinder regulator due to swivelling turret. Four medium pressure ports mounted on a swivel turret. Two high pressure ports on the body.
This rock-hard and tested Apeks DST first stage regulator is now available with a fifth port conversion kit fitted to upgrade it from 4 to 5 ports. The end-port allows any length dry suit/wing LP hose attachment and direct routing to the kit -- leaving 4 LP ports and 2 HP ports for other hose routing. The DST boasts a swivel turret making it ideal for any kind of side-slung setup from stage bottles to CCR bailout and plain sidemount.
Leading features of the Apeks MTX-R first stage include a world-first over-moulded first-stage end cap to the sealed (environmental) diaphragm helping prevent ice buildup that could cause first stage free flow in extreme circumstances.
The cold water rated Apeks MTX-RC 1st stage features a unique over-balanced diaphragm design – as the diver descends, the overbalancing feature allows the medium pressure gas in the hose to increase at a faster rate than ambient. This results in superior performance at depth.
Apeks TEK3 first stages are specifically designed for use on a twinset. The system benefits from streamlined hoses with little chance of accidental snagging and also improved ease of access to cylinder valves. The set includes both left and right hand side first stages.
Apeks US1 First Stage regulator is a compact unsealed first stage with 1 x 3/8 medium pressure ports and one high pressure port.
The Apeks US4 first stage regulator is a compact unsealed First Stage with 4 x 3/8 medium pressure ports and 1 x high pressure port. Popularly used with air on optional suit inflation bottles as an alternative suit inflation method.
New from Apeks, the XL4 regulator is designed with the cold-water exploration diver in mind. Weighing in at only 905g (DIN version), the XL4 is the lightest ever cold-water First Stage produced by Apeks - greatly reducing the risk of a free flow in low temperatures due to exclusive design.
Add an additional 5th port to your Apeks XTX200 and XTX100 first stages (FSR and FST type). A 5th port offers the user more versatility in terms of hose routings and port positions depending on the type of diving.
Environmentally sealed Apeks XTX200 FSR first stage is balanced for superior performance. Also available with fitted 5th port.
Scubapro DIN/Int adapter is a lightweight travel adapter for divers who are used to diving with DIN systems.
