Aqualung Calypso / Titan Octopus
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Check the first-stage compatibility and intended configuration stated by the manufacturer.
Octopus Regulators
Compare octopus regulators and compatible alternate second stages for your scuba system.
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Apeks XTX 40 Octopus
Compare hoses and adjustment features
Check whether the hose is supplied and compare its listed length with the requirements of your complete regulator system.
TUSA S0011 Octopus Second Stage
Check servicing and replacement parts
Compare the manufacturer’s servicing requirements and the availability of the correct replacement mouthpiece, hose and other accessories.
Choose a compatible regulator setup
Check the first-stage compatibility and intended configuration stated by the manufacturer. Review hose inclusion, length, mouthpiece and adjustment features. A secondary regulator needs to work within the complete system, so ask our team about matching components and appropriate servicing.
Explore the wider Regulators collection to compare related equipment and accessories.
Need help choosing? Ask our Hallam team for advice on the options that suit your equipment and plans.
Compare hoses and adjustment features
Check whether the hose is supplied and compare its listed length with the requirements of your complete regulator system. Mouthpiece shape, adjustment controls and the listed second-stage features can differ between models.
Choose a manufacturer-approved match for your first stage. Ask a qualified technician to confirm the combination before ordering separate components.
Check servicing and replacement parts
Compare the manufacturer’s servicing requirements and the availability of the correct replacement mouthpiece, hose and other accessories. Similar-looking parts are not necessarily interchangeable.
Give our team the exact first-stage and second-stage model names when asking about a replacement octopus or compatible spare part.
$899.95 inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced
$799.95 inc. GST
Type: BCD inflator + backup regulatorCompatibility: Check corrugated-hose adapter fit
$699.95 inc. GST
Component: Alternate second stage (octopus)Automatic Flow Control; rapid adjustment knob
Out of stock
$620.00 inc. GST
Out of stock
Component: Separate second stageVenturi lever and inhalation-effort control
10.5%
Original price was: $619.00.$554.01Current price is: $554.01. inc. GST
Component: Alternate second stage + BCD inflatorDownstream alternate air source
10%
Original price was: $549.95.$494.96Current price is: $494.96. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced demand valve
10.5%
Original price was: $549.00.$491.36Current price is: $491.36. inc. GST
Component: Alternate second stage (octopus)
9.4%
Original price was: $530.00.$480.00Current price is: $480.00. inc. GST
Component: Alternate second stage (octopus)Venturi lever and inhalation-effort control
2.3%
Original price was: $480.00.$469.00Current price is: $469.00. inc. GST
Type: Accessory
4.4%
Original price was: $480.00.$459.00Current price is: $459.00. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced downstream valve
Out of stock
$400.00 inc. GST
Out of stock
Component: Alternate second stage (octopus)Venturi lever and inhalation-effort control
$399.95 inc. GST
Type: BCD power inflatorControls: Inflation and deflation; stainless-steel mechanism
$379.95 inc. GST
Component: Alternate second stage (octopus)Downstream valve
10.5%
Original price was: $390.00.$349.00Current price is: $349.00. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced downstream valve
3.1%
Original price was: $360.00.$349.00Current price is: $349.00. inc. GST
Component: Alternate second stage (octopus)Venturi lever
5.8%
Original price was: $360.00.$339.00Current price is: $339.00. inc. GST
Component: Alternate second stage (octopus)Venturi lever
5.9%
Original price was: $340.00.$320.00Current price is: $320.00. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced downstream valve
13.6%
Original price was: $369.00.$319.00Current price is: $319.00. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced
10.5%
Original price was: $355.00.$317.73Current price is: $317.73. inc. GST
Component: Alternate second stage (octopus)Venturi lever
10%
Original price was: $339.00.$304.95Current price is: $304.95. inc. GST
Component: Alternate second stage (octopus)Downstream
Out of stock
$299.95 inc. GST
Out of stock
This product has multiple variants. The options may be chosen on the product page
6.6%
Original price was: $320.00.$299.00Current price is: $299.00. inc. GST
Component: Alternate second stage (octopus)Pneumatically balanced
10%
Original price was: $300.00.$269.95Current price is: $269.95. inc. GST
Component: Alternate second stage (octopus)
$260.00 inc. GST
Component: Alternate second stage (octopus)
$249.95 inc. GST
Component: Alternate second stage (octopus)Demand valve
10.8%
Original price was: $279.00.$249.00Current price is: $249.00. inc. GST
Component: Alternate second stage (octopus)Downstream
10.5%
Original price was: $249.00.$222.86Current price is: $222.86. inc. GST
Component: Alternate second stage (octopus)Mechanical downstream valve
10%
Original price was: $239.00.$215.00Current price is: $215.00. inc. GST
Component: Alternate second stage (octopus)Downstream
5%
Original price was: $219.95.$209.00Current price is: $209.00. inc. GST
Component: Alternate second stage (octopus)Downstream demand valve
25.1%
Original price was: $199.00.$149.00Current price is: $149.00. inc. GST
Component: Alternate second stage (octopus)Downstream demand valve