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Cylinders

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Dive cylinders are what scuba divers carry their gas in.

They are commonly made from aluminium or steel.  Composite materials can be used but then extra weight is required to be worn by the diver to allow them to sink.

Scuba cylinders are usually carried on the divers backs using a BCD, but some use a side mounted option bcd.  Some styles of diving use multiple cylinders and have Twin Tanks - two cylinders either manifolded together with an isolation valve or have them side mounted on either side of their torso.  Each tank has a valve and so the diver has two first stage regulators connected to two second stages.

We keep cylinders in stock, but do not sell online due to shipping fees and limitations.  They cannot be shipped with gas inside and so any reputable scuba filling station will want to open up an empty tank to look inside before filling.  And so they will charge you for this.

Which is right for you?

Steel cylinders have a round bottom and have to wear a boot if you want them to stand up.  They also have to be painted to stop the steel from rusting. 

In New Zealand they normally have a working pressure of around 230bar and should be paired with an equally rated valve.  The filling station can only fill to the lowest pressure out of the two, so there is no point having a 230 bar tank and a 204 bar valve on it.

Steel cylinders do not become very buoyant when the air is breathed down, so the diver generally does not need extra weight to compensate for the used air.

Aluminium cylinders have a flat bottom and so do not need a boot.  They also do not need to be painted.  Most are rated at around 204bar, but there are some higher rated cylinders.  They become buoyant from around 120bar and so the diver may need around 1kg to 2kg of extra weight when diving to compensate for lift created as the air is used.  You may notice your trim change as the air is used.

If you are trained to use Enriched Air Nitrox, Oxygen or Tri-Mix, then as you know your cylinder will need to be labelled appropriately to identify what is in it.    We like to use reusable contents labels rather than tape.

In New Zealand all scuba cylinders require a LAB or ISO number that is on the WorkSafe cylinders register to be able to be tested and filled. 

Cylinders need visually testing every year and hydrostatically tested every 2 years.

REMEMBER TO RINSE YOUR CYLINDER WITH FRESH WATER AFTER USE. THIS INCLUDES UNDER THE BOOT AND ANY NETTING. 

Salt leads to corrosion, leading to your tanks failing the annual inspection.


  • Gas Analysis MOD Decal Reusable
    Gas Analysis MOD Decal Reusable
    $6.00
  • Dive Now Nitrox Tank Decal
    Dive Now Nitrox Tank Decal
    $20.00
  • Scuba O Rings and Pick Tool in a Fun Mini Dive Tank Keyring Scuba O Rings and Pick Tool in a Fun Mini Dive Tank Keyring
    Scuba O Rings and Pick Tool in a Fun Mini Dive Tank Keyring
    $24.00
  • Sherwood Cylinder Valve DIN Insert Sherwood Cylinder Valve
    Tank Valve
    $149.00
  • Faber Steel Cylinder 15L
    Faber Steel Cylinder 15L
    $729.00
  • Faber Steel cylinder 12L from
    Faber Steel cylinder 12L from
    $589.00
  • Sold Out
    Faber Steel Cylinder 5L with Valve
    Faber Steel Cylinder 5L with Valve
    $429.00
  • Faber Steel Cylinder 10L
    Faber Steel Cylinder 10L
    $569.00
  • Catalina Aluminium Cylinder 40 cu ft / 5.75L with DIN/K Valve
    Catalina Aluminium Cylinder 40 cu ft / 5.75L with DIN/K Valve
    $574.00
  • Catalina Aluminium Cylinder 95 cu ft / 11.3L 240bar
    Catalina Aluminium Cylinder 95 cu ft / 11.3L 240bar
    $724.00
  • Catalina Aluminium Cylinder 80 cu ft / 11.1L with DIN/K Valve
    Catalina Aluminium Cylinder 80 cu ft / 11.1L with DIN/K Valve
    $639.00
  • Faber Steel Dive Tank 12.2L Dumpy with valve
    Faber Steel Cylinder Dumpy 12.2L
    $659.00
  • Foam scuba tank holder
    Foam Tank Holder
    $49.00
  • Premium Dual Outlet Manifold with Isolator Premium Dual Outlet Manifold with Isolator
    Premium Dual Outlet Manifold with Isolator
    $599.00
  • Heser Tank Bands - Pair -  D10/D12 WIDE 178/215
    Heser Tank Bands - Pair - D10/D12 WIDE 178/215
    $249.00
  • Manifolded valves with isolator for Back Mounted Twin Tank diving Manifolded valves with isolator for Back Mounted Twin Tank diving
    225 BAR Twin Manifold 3/4 NPSM
    $495.00
  • Trimix Cylinder Decal
    Trimix Cylinder Decal
    $15.00
  • MOD Decal MOD Decal
    MOD Decal
    $12.00
  • Sold Out
    21 MOD Sticker for dive tank
    MOD 21 Decal EACH
    $10.00
  • Trident Roll Control tank holder system
    Roll Control White Aluminium rail
    $59.00
  • Roll Control - Adjustable tank bracket
    Roll Control - Adjustable tank bracket
    $75.00
  • Roll Control End Caps Roll Control End Caps
    Roll Control End Caps
    $29.00
  • Sale
    Tank Cap
    Tank Cap
    $5.90
    $10.00
  • DIN Valve Plug DIN Valve Plug
    DIN Valve Plug
    $8.00
  • Tank Mesh
    Tank Mesh
    $11.00
  • Faber Tank boot
    Faber Tank boot
    $29.00
  • DIN to Yoke Adaptor DIN to YOKE ADAPTER
    DIN to Yoke Adaptor
    $120.00
  • Tank Handle for steel cylinders
    Tank Handle for steel cylinders
    $20.00
  • Delrin thumbwheels
    Delrin thumbwheels
    $69.00
  • O Ring Tool Guide
    O Ring Tool Guide
    $49.00
  • Premium Back Mounted Twin 12L Fabers Premium Back Mounted Twin 12L Fabers
    Premium Back Mounted Twin 12L Fabers
    $1,950.00
  • Rubber Boot for a Steel Dive Tank
    Faber Steel Tank Rubber Boot
    $55.00
  • Sidemount Cylinder Valve Sidemount Cylinder Valve
    Sidemount Cylinder Valve
    $185.00
  • Halcyon Stage Rigging Kit Halcyon Stage Rigging Kit for 40cf or 80cf scuba cylinder
    Halcyon Stage Rigging Kit
    $129.00
  • Heser bands for 80 cuft - PAIR
    Heser bands for 80 cuft - PAIR
    $249.00
  • DIN to 3 Pin Medical O2
    DIN to 3 Pin Medical O2
    $249.00
  • Save money at Dive NOW with the scuba air fill concession card
    Air Fill Card - 10 Fills
    $100.00
  • Heser bands for 12L Faber - PAIR
    Heser bands for 12L Faber - PAIR
    $249.00
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C
Mares Mesh Back Pack
Christine Butler
Awesome quality product

These are actually amazing. They come in their own small zipper bag which you open and empty but the you turn the badge inside out and it is inside the mesh bag and you can put your phone etc in it and zip it up. Totally worth it

R
Prodive Silicone Swim and Snorkel Fin
Rob Worlledge
Swim Fins

Very comfortable, Very happy with purchase and service

T
Prodive Open Heel Fins
Tereina Henare

Prodive Open Heel Fins

S
Beuchat Maxlux Evo Mask
Shayne Gamble

Beuchat Maxlux Evo Mask

D
Suunto Vyper or Zoop Novo Replacement Strap
David Atkinson
Wrong item

Strap was not the same as in picture. Therefore didn't fit. I sent photos in email but had no response. I had to trim all the rubber off the strap and melt with a soldering iron to make strap fit. Wasn't happy with no reply to my email.

123