Scuba Double Tanks

Catalina 80 Cubic Foot Aluminum Tank with Pro Valve

151 reviews

SKU: AQUTA8BK

~~$339.95~~ Save: $57 (17%)

^$282.95

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In Stock

DESCRIPTION

A 80 cubic foot aluminum tank with a pro valve that won't rust, has great buoyancy, and a high flow capacity valve.

Pros

Well-made and durable
Good customer service
Variety of color options
Great price and value
Fast delivery time

Blue Reef Tank Pressure Checker

75 reviews

SKU: AQUTPC

^$79.95

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In Stock

DESCRIPTION

A blue tank pressure checker with a 5000 psi read-out, made of marine grade brass.

Pros

Useful tool for checking tank pressure
Good value for the price
Quick and accurate readings
Convenient and handy
Well-built and durable

Catalina Pony Bottle Tanks with Pro Valve

70 reviews

SKU: AQUTP40

~~$284.95~~ Save: $34 (12%)

^$250.95

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In Stock

DESCRIPTION

A reliable, nitrox-ready aluminum pony tank with high flow capacity valve and convertible K-valve.

Pros

Perfect size for various needs
Sufficient air capacity
Economical price
Reliable backup option
Versatile for different diving scenarios

XS Scuba Faber High Pressure Steel Tank

50 reviews

SKU: FBRHP100G

^$519.95

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In Stock

DESCRIPTION

A versatile high-pressure steel tank with buoyancy advantages, Nitrox ready up to 40%.

Pros

High gas capacity
Good value for the price
Excellent tank and valve setup
Fast delivery and great condition
Improved buoyancy characteristics

Cressi Aquapro + BCD

20 reviews

SKU: CSBAPPSM

~~$399.95~~ Save: $125 (31%)

^$274.95

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In Stock

DESCRIPTION

A weight-integrated BCD with adjustable straps, relief valves, and accessory pockets by Cressi.

Pros

Great value
Durable construction
Easy-to-use weight pockets
Secure tank hold
Comfortable fit

Blue Steel Tank Boots for Faber Tanks

13 reviews

SKU: FBRTB80

~~$16.99~~ Save: $5.99 (35%)

^$11

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In Stock

DESCRIPTION

A self-draining blue tank boot that protects and supports Faber tanks for easy mounting of dive rig.

Cressi Solid Scuba Package

12 reviews

SKU: CSBSLPCKXS

~~$844.80~~ Save: $329.85 (39%)

^$514.95

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In Stock

DESCRIPTION

A durable scuba package with jacket-style BCD, rigid backpack, and reliable demand valve.

Tank to Tank Equalizer with Pressure Gauge

11 reviews

SKU: AQUTTE

^$169.95

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In Stock

DESCRIPTION

A Tank to Tank Equalizer with Pressure Gauge that maximizes air availability and is a great Save-A-Dive-Kit item.

Tusa SS-0002 Duo Air II Alternate Combo Inflator

10 reviews

SKU: TBTSS02

^$299

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In Stock

DESCRIPTION

A combination octopus regulator/power inflator with an air balanced power inflator valve and classic downstream regulator valve.

Aqua Foam Tank Rack for 2 Tanks

9 reviews

SKU: AQUTRDF

^$39.95

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In Stock

DESCRIPTION

A lightweight foam rack that securely holds two tanks and prevents rolling.

Zeagle Back-Plates

7 reviews

SKU: ZGLSSBP

^$259.95

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In Stock

DESCRIPTION

A versatile back-plate for easy mounting of Zeagle bladders, available in stainless steel or anodized aluminum.

Blue Reef Cross-Over Equalizer

6 reviews

SKU: AQUTCED

~~$169.95~~ Save: $55.00 (32%)

^$114.95

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In Stock

DESCRIPTION

A blue tank accessory with chrome plated brass fittings that maximizes air availability and is equipped with bleeder valves.

Aqua Foam Tank Holder for 2 to 3 Cylinders

5 reviews

SKU: AQUFTH2

^$42.95

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In Stock

DESCRIPTION

A non-corrosive foam holder for 2-3 scuba tanks, preventing rolling and increasing transport safety.

Faber 23 High Pressure Steel Tank Only

4 reviews

SKU: FBRHP23B

~~$339.95~~ Save: $30 (9%)

^$309.95

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In Stock

DESCRIPTION

A high-pressure steel tank that is nitrox ready and supports weight distribution, made of chromium molybdenum steel.

XS Scuba Standard Tank Backpack

4 reviews

SKU: XSSSB

^$96

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In Stock

DESCRIPTION

A traditional single tank backpack with adjustable band and quick release buckles.

Dive Rite Stainless Steel Single Tank Adapter (STA)

4 reviews

SKU: DIV1090SS

^$79

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In Stock

DESCRIPTION

A marine-grade stainless steel adapter for Dive Rite wings, adding versatility to your set-up.

XS Scuba 8" (20.3cm) Octagon Tank Boot for Steel Tanks

3 reviews

SKU: XSSTB8

^$31

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In Stock

DESCRIPTION

A durable, self-draining tank boot with an octagon rim to prevent tank rolling.

Sea Pearl's 7.25 (18.4cm) Round Tank Boot for Steel Tanks

3 reviews

SKU: XSSTB725S

^$31

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In Stock

DESCRIPTION

A durable tank boot with self-draining ribs and an elliptical round bottom for steel cylinders.

Highland by XS Scuba Single Tank Adapter

2 reviews

SKU: XSSSTA

^$87.95

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In Stock

DESCRIPTION

A sturdy 316 stainless steel adapter for stable mounting of a single cylinder with dual cam band support.

Dive Rite TransPac Stabilizer Plates for Doubles

2 reviews

SKU: DIV2084

^$16.50

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In Stock

DESCRIPTION

A corrosion-resistant stainless steel stabilizer plate for double tanks, compatible with standard twin bands.

XS Scuba Tank Holder TR120 ~Single

2 reviews

SKU: XSSTR120

^$50.95

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In Stock

DESCRIPTION

A durable tank holder with adjustable silicone tubing, suitable for 7.25" diameter tanks.

Thunderbird 40 cu. Ft Aluminum Tank with Pro valve

2 reviews

SKU: MTLTA40YL

^$264.95

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In Stock

DESCRIPTION

A 40 cu. ft aluminum tank with Pro valve, nitrox ready up to 40%, corrosion-resistant and convertible.

XS Scuba Tank Banger

2 reviews

SKU: XSSTKBG

^$11

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In Stock

DESCRIPTION

A corrosion-free tank banger with left or right hand operation for simple signaling underwater.

Thunderbird 80 cu. ft Aluminum Tank ~ Limited Time FREE with Thermo International Valve, Tank Boot and Valve Cap

2 reviews

SKU: MTLTA80SB

^$344.95

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In Stock

DESCRIPTION

A corrosion-resistant aluminum tank with convertible valve options and easy grip hand-wheel.

XS Scuba Tank Holder TR120 Kit

1 reviews

SKU: XSSTR120K

^$114.90

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In Stock

DESCRIPTION

A durable and versatile tank holder kit that securely holds up to 3 scuba cylinders.

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Scuba Double Tanks

Exploring the underwater world with double tanks is an experience that opens up new possibilities for divers who crave adventure, extended bottom times, and the confidence that comes with added gas reserves. As summer heats up and dive trips become more frequent, many seasoned divers find themselves seeking the reliability and versatility that double tank setups provide. Whether preparing for technical dives, deep wreck explorations, or simply wanting the peace of mind that comes from redundancy, double tanks are a staple for those who take their underwater pursuits seriously. The extra capacity allows for longer dives, more time to photograph marine life, and the ability to explore sites that would otherwise be out of reach with a single tank. For instructors guiding students through complex skills or dive buddies venturing into remote locations, double tanks are not just a luxury—they’re often a necessity.

Choosing the right double tank setup involves careful consideration of several factors, each tailored to the diver’s unique needs and aspirations. Buoyancy characteristics, tank material, and valve configuration all play a crucial role in determining comfort and safety underwater. Steel cylinders, for example, offer negative buoyancy and are favored by many for their compact size and trim, while aluminum tanks are lighter and easier to handle on land. The manifold system is another critical component, allowing divers to isolate tanks in the unlikely event of a failure, providing a level of security that’s hard to match with single tank systems. Divers planning for cold water or extended decompression stops often opt for larger capacities, ensuring ample breathing gas and reserve. For those just starting to transition from recreational to technical diving, it’s important to seek out double tank packages that are compatible with their existing gear, including harnesses, wings, and backplates. Many divers share stories of their first double tank dive—how the added weight felt at the surface, the adjustment to trim, and the exhilaration of knowing they could stay down longer, explore further, and surface with extra air in reserve. These setups are also a thoughtful gift for dive buddies celebrating milestones, instructors expanding their teaching repertoire, or anyone ready to take their diving to the next level.

Maintenance and safety are paramount when using double tanks, as the additional complexity requires regular inspection and careful handling. Summer dive trips often mean back-to-back days on boats or shore entries, so it’s essential to check O-rings, valves, and manifold connections before every dive. Storing tanks out of direct sunlight and rinsing them thoroughly after saltwater use helps prolong their lifespan. For divers who prioritize redundancy but prefer a more streamlined setup for certain dives, it’s worth exploring alternatives like stage bottles or pony tanks, which can be found on our Scuba Backup Tanks page. As you prepare for the season’s adventures, investing in the right double tank system ensures that every dive is not just longer, but safer and more enjoyable. Whether you’re gearing up for a summer of exploration or gifting a loved one the equipment they need for their next big dive, double tanks are a cornerstone of serious underwater adventure.

Top Picks For Scuba Double Tanks