Cressi MC9 Compact + Octopus Regulator Set
Original price was: $899.00.$808.95Current price is: $808.95. inc. GST
A compact warm-water regulator with a diaphragm first stage and 135 g Compact second stage. Its simple Venturi control and small profile make it easy to pack and use. Supplied with a Compact octopus.
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- Description
- Technical Specs
- Additional information
- Product Manual
- Shipping
- Returns & Exchanges
- Click & Collect
- Frequently Asked Questions
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Cressi MC9 Compact + Octopus Regulator Set
The Cressi MC9 Compact keeps a warm-water regulator small and easy to pack. Its diaphragm first stage supplies the 135 g Compact second stage, making it a useful option when you want less bulk at your mouth without adding complicated controls.
Features and benefits
- Diaphragm first stage. The hyper-balanced mechanism manages the intermediate-pressure supply as conditions change, helping the second stage receive a steady supply of gas.
- Small second stage. The compact body reduces bulk at your mouth and is easy to pack. A large front purge button remains easy to find by touch.
- Dive/pre-dive control. The Venturi lever changes how the air stream assists inhalation. Use the pre-dive position during surface handling and while an alternate second stage is stowed, then the dive position when breathing from it, following the manual.
- Room for your instruments. Two high-pressure ports and four low-pressure ports provide separate connection points for compatible gauges, second stages and inflator hoses.
- Protected first-stage body. The metal finish and external bumper help protect the regulator during ordinary handling. The standard MC9 remains a warm-water model.
Setup and compatibility
Choose the DIN or yoke option to match your cylinder valve and pressure rating. Have the complete regulator assembly configured and checked by a qualified technician. The maximum usable pressure is limited by the lowest-rated component in the system.
This combination is for water above 10°C. A cold-water second stage alone does not turn a warm-water first stage into a cold-water regulator system.
What’s included
MC9 first stage, Compact primary second stage and Compact octopus in the selected connection option.
Care, rinsing and storage
After each dive, connect the assembled regulator to a scuba cylinder and open the valve to pressurise the system. Keep it pressurised while fully submerging the first stage, second stages and connected hoses in fresh water. This allows thorough cleaning of the exposed components and hoses while helping prevent water entering the internal air passages, where it can cause corrosion and damage. Keep the cylinder secure throughout cleaning.
For routine cleaning, Dive Gear Australia recommends Cressi Neoclean Wetsuit Wash Neoprene Cleaner 500 mL or Revivex Wetsuit Shampoo 10 oz to help remove salt, chlorine and everyday residue. Dilute according to the cleaner’s label, then rinse thoroughly with fresh water.
Keep the regulator pressurised throughout washing and rinsing. Lift it out of the water and dry the first stage and cylinder connection before closing the cylinder valve, releasing the pressure and disconnecting. Fit the clean, dry dust cap, then allow the regulator to dry in the shade. Store it with the hoses loosely curved, without sharp bends or tension.
Before each dive, inspect the mouthpiece, hoses and connections for wear or damage. Have your regulator serviced by an authorised Cressi technician at the interval specified in its manual, or sooner if it leaks, is damaged or its breathing performance changes. Leave internal adjustments and repairs to a qualified technician.
Technical Specs
| Brand | Cressi |
|---|---|
| Main model / configuration | Cressi MC9 / Compact |
| Product type | Regulator |
| Regulator type | Regulator Set |
| Regulator connection | Din, Yoke |
| First-stage design | Hyper-balanced diaphragm |
| Second-stage design | Standard downstream |
| High-pressure ports | 2 × 7/16 in UNF |
| Low / medium-pressure ports | 4 × 3/8 in UNF |
| Cold-water suitability | Warm water above 10°C |
| Breathing adjustment | Venturi adjustment |
| Intermediate pressure | 9.5–10 bar |
| Colours / options | Black |
| Colour family | Black |
| First-stage weight | DIN: 450 g; INT/yoke: 590 g |
| Second-stage weight | 135 g without hose |
| Connection pressure rating | DIN 300 bar; INT/yoke 232 bar |
Based on Cressi product information.
| Colour | |
|---|---|
| Regulator Connection | Din, Yoke |
Official manufacturer instructions for this product.
Cressi Regulators User Manual - Revision 18, 2026
Cressi Regulators Read First Safety Instructions - Revision 18, 2026
Read the manual before use. For firmware updates, follow the manufacturer support link. Our team can help during business hours.
In-stock orders placed before 12 noon Melbourne time on weekdays are usually dispatched the same day once payment is confirmed. This excludes public holidays, pre-orders, backorders, special orders and custom orders. Dispatch times can vary. Delivery time depends on the carrier and your location.
Standard mainland Australian shipping is $20. Click & Collect from our Hallam store is free once your order is ready.
- Large or bulky gear: additional freight charges apply on top of standard shipping: large dive bags $30; long freediving fins $15; long spearguns $20. Scuba tank freight is shown at checkout.
- Rural, remote & offshore: rural means anywhere outside metropolitan areas. Carrier availability and additional charges may apply, including for island and territory destinations. Our team will contact you if an extra freight quote is needed.
The available delivery rate for your order is shown at checkout.
Need your gear urgently? You are welcome to arrange your own same-day courier or Uber pickup from Hallam. Call 03 9702 3694 before booking so we can confirm payment, that your order is packed and ready, and a collection time. Tell us who will collect and give your driver the order number. You arrange and pay the courier directly; delivery timing depends on the provider.
Contact us within 30 days of delivery to request a refund, exchange or optional store credit on eligible unused goods within Australia. Refunds go to the original payment method. Keep goods clean and undamaged with tags, original packaging and all accessories. No restocking fee applies to eligible returns meeting these conditions.
For change-of-mind returns and size exchanges, you pay return postage and replacement shipping. Original delivery charges are not refunded. Water-tested goods, clearly marked clearance items and genuinely custom-made or personalised items are excluded from change-of-mind returns. Ordinary discounted goods remain eligible.
For product problems, please call 03 9702 3694 before returning an item so we can help and explain the next steps.
Still unsure which size to choose?
Call our experienced dive instructors on 03 9702 3694 before ordering. Have your measurements and preferred product ready so we can help you choose the most suitable size. Fit varies between brands and models.
FREE CLICK & COLLECT
Usually ready same day*
Select local pickup at checkout. We will email you when your order is ready. Please wait for your ready-to-collect confirmation before visiting, then bring your confirmation email and photo ID.
Need your gear urgently? You can arrange your own same-day courier or Uber pickup. Call 03 9702 3694 before booking so we can confirm payment, that your order is packed and ready, and a collection time. Tell us who will collect and give your driver the order number. You arrange and pay the courier directly; delivery timing depends on the provider.
Collect from our Hallam store
Factory 4 / 56–60 Hallam South Rd
Hallam VIC 3803
*For items in stock at our Hallam store during opening hours, subject to order processing. Available-to-order and special-order items take longer. Collection is unavailable while the store is closed.
Can I collect my order from the store?
Yes. Choose free local pickup at checkout and wait for your ready-to-collect email before visiting our Hallam store. Bring your confirmation and photo ID. See Click & Collect details.
How do I choose the right size?
Use the product's size chart where available and compare your measurements with the guide for that brand. Sizing varies between brands and products. Still unsure? Call our experienced dive instructors on 03 9702 3694 during business hours before ordering. Have your measurements and preferred product ready. For fins and boots, tell us which socks or dive boots you will wear.
How do I check availability?
Select your required options, such as colour and size, to see availability for that variation. “Available to order” means the item may need to be sourced before dispatch. Call 03 9702 3694 to check the current lead time before ordering, especially if you need your gear for a trip or a particular date.
When will my order be dispatched?
In-stock orders placed before 12 noon Melbourne time on weekdays are usually dispatched the same day once payment is confirmed. This excludes public holidays, pre-orders, backorders, special orders and custom orders. Dispatch times can vary. Delivery time is separate from dispatch time and depends on your location and the carrier. Read our shipping information.
Can I exchange an item if it does not fit?
Contact us within 30 days of delivery to request a refund to the original payment method, exchange or optional store credit on eligible unused goods. You pay change-of-mind return postage and replacement shipping; original delivery charges are not refunded. No restocking fee applies to eligible returns. Clearance and genuinely custom-made items are excluded from change-of-mind returns. Read the return conditions and next steps.
Can you help me choose the right gear?
Yes. Call 03 9702 3694 during store hours or email [email protected]. Tell us which product you are considering and how you plan to use it.
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