Tanks (Cylinders)

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For cylinders & valves for rebreathers, visit our CCR Cylinders & Valves page.

Dive Gear Express stocks many different sizes of steel and aluminum pony, deco, and inflation SCUBA Cylinders (aka SCUBA "Tanks") preferred by experienced sport and technical divers. We ship your Nitrox Ready cylinder with the valve installed (domestic US only). Unless you select no valve, the valve included in our price is a very high quality Thermo Pro DIN/K valve suitable for use with both DIN or Yoke regulator fittings. Cylinders ordered with valves will have a current month decal indicating Nitrox Ready.

SCUBA Tanks must be hydrostatically tested every five years (60 months). The larger primary cylinders typically have a factory hydro date between 3 and 9 months old, but not more than 12 months old. Smaller cylinders may have a factory hydro date up to 24 months old as these are manufactured less frequently.

Cylinder prices do include FREE continental 48 U.S. domestic shipping

Cylinder prices do NOT include international shipping, or shipping to Alaska, Hawaii, APO/FPO, or U.S. Territories. Our cylinders and valves are Imperial 3/4 NPS neck threads, NOT Metric M25 neck threads, and the valves have overpressure relief devices. The cylinders have US DOT and Canadian CTC markings suitable for use only in North America. Our cylinders and valves are NOT CE approved and NOT suitable for use in the European Union.

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What Happened to Low-Pressure (LP) Cylinders?

Many experienced divers have traditionally preferred low-pressure cylinders because they are easier on regulators, have no short-fill concerns, and are more suitable for partial-pressure blending. The Faber LP-50 and LP-85 low-pressure steel cylinders have particular size and trim sidemount diving characteristics that are not currently available with any other cylinder. But with that exception, we no longer offer primary low-pressure cylinders.

The old low-pressure DOT 3AA design cylinders (2640 psi, i.e., 2400 with a +) are being replaced by modern high-pressure DOT SP design cylinders (3442 psi, no plus needed). That's because you can use the high-pressure 3442 psi cylinders as low-pressure 2640 psi cylinders if you prefer, simply by under filling. Manufactured from high-tech steel alloys, the 3442 psi DOT SP cylinders have similar lengths, diameters, and capacities at 2640 psi as the old 3AA low-pressure cylinders. Even better, the empty weight of the modern cylinder design has been reduced slightly, yet the buoyancy remains slightly negative when empty.

One idea we like is selecting a larger capacity cylinder and then deliberately under fill. For example the HP100 yields 89 cubic feet at 3000 psi. That is plenty of gas for most dives, puts an end to short fills, and the lower pressure is easy on equipment, yet allows the option of a high-pressure fill when you need really need more gas. This is how divers have for years been using overfilling with low-pressure cylinders, but with the advent of the large-capacity high-pressure cylinders, it eliminates the concerns regarding overfills.

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