The Catalina S40 is a 40 cu ft aluminium pony bottle (5.8 L water capacity), rated to 207 bar (3000 psi) and supplied in yellow with a convertible Pro valve. It is a compact bailout or redundant gas cylinder for divers who want a backup supply on deeper or solo-minded dives, and a light tank for short shallow dives and pool training.
On boat dives off Fujairah, Dibba and Musandam a pony bottle clipped to your BCD adds a real safety margin. Aluminium does not rust like steel: it forms a protective oxide layer, so it copes well with salt water and the humid UAE coast. The valve takes yoke regulators and converts to DIN by removing its insert, and the cylinder is nitrox ready up to 40%.
Features
Feature
What it does for you
Compact pony size
Small enough to sling on your BCD as a bailout or redundant gas supply.
Aluminium alloy
Oxidises instead of rusting, so it handles salt water and humidity well.
Convertible Pro valve
Works with yoke regulators, or DIN once the insert is removed.
Nitrox ready
Cleaned for nitrox mixes up to 40%.
Yellow finish
High-visibility colour that is easy to tell apart from your main tank.
Specification
General
Brand
Catalina
Model
S40
Colour
Yellow
Material
Aluminium alloy 6061-T6
Standards
DOT-3AL, TC-3ALM
Capacity
Gas capacity
40 cu ft
Water capacity
5.8 L
Working pressure
207 bar (3000 psi)
Dimensions and weight
Diameter
13.34 cm
Length
64.5 cm
Cylinder weight
7.3 kg
Buoyancy
Full
-0.68 kg (-1.5 lb)
At 34 bar (500 psi)
+0.32 kg (+0.7 lb)
Empty
+0.64 kg (+1.4 lb)
Valve
Valve
Pro valve, yoke with removable DIN insert
Thread
3/4-14 NPSM
Nitrox
Ready up to 40%
Vendor code
AC40YL
Shipping and package
Package size (L x W x H)
72 x 17 x 17 cm
Shipping weight
8.3 kg
CUSTOMER REVIEWS
Frequently Asked Questions
How much gas does the Catalina S40 hold?▼
It holds 40 cu ft of gas at its 207 bar (3000 psi) working pressure, from a 5.8 L water capacity cylinder.
Will the valve work with my DIN or yoke regulator?▼
Yes. The Pro valve takes yoke regulators as supplied, and converts to DIN when you remove its insert.
Can I fill it with nitrox?▼
Yes, the cylinder is nitrox ready for mixes up to 40% oxygen. Have it filled at a dive centre that offers nitrox.
