HQ Diving D Shackle – 316 Stainless Steel 25mm x 15mm 
Cressi MC9 Compact + Octopus Regulator Set
Original price was: $899.00.$808.95Current price is: $808.95. inc. GST
This Cressi set combines the MC9 balanced-diaphragm first stage, Compact second stage and an octopus. Two high-pressure and four medium-pressure ports provide connection options. Choose the DIN or Yoke version to match your cylinder valve.
- Description
- Technical Specs
- Additional information
- Shipping
- Returns & Exchanges
- Click & Collect
- Frequently Asked Questions
Cressi MC9 Compact + Octopus Regulator Set
The MC9 Compact + Octopus set provides a primary regulator and alternate second stage for a compatible scuba setup. The MC9 first stage uses a balanced diaphragm, while the Compact second stage has a lightweight body and Venturi control.
- MC9 first stage, Compact primary second stage and octopus.
- Two high-pressure and four medium-pressure ports.
- DIN version rated to 300 bar or Yoke version rated to 232 bar.
- Compact second-stage body listed at 135 g without hose.
- Venturi control and purge button.
Select the correct connection and follow Cressi’s operating and service requirements.
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 |
| Regulator set weight | Not confirmed — catalogue total and component weights disagree |
| 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 |
TECHNICAL FEATURES 1ST STAGE
| - Service pressure | 300 bar (4350 psi) DIN version, 232 bar (3365 psi) Yoke version |
|---|---|
| - Setting spring | stainless steel with micropeening treatment |
| - Flow rate | 4500 l/min |
| - Yoke version weight | 590 g |
| - Din version weight | 450 g |
- - Balanced diaphragm (seal chamber for MC9SC)
- - Anti-pressure drop pneumatic spring
TECHNICAL FEATURES 2ND STAGE
| - Weight without hose | 135 g COMBINATION PERFORMANCE |
|---|---|
| JACKETED HOSE extremely light and flexible weight | 153 g |
- - Downstream system- Adjustable venturi effect
- - Big purge button
Sources: Cressi 2027 Scuba Diving buyer’s guide; Current product information.
| Colour | |
|---|---|
| Regulator Connection | Din, Yoke |
We dispatch orders five days a week, usually within 1–3 days. 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.
We offer a 30-day exchange on most unused products within Australia when they are in saleable condition with their original packaging and accessories. Please contact us with your order number before returning an item. Change-of-mind refunds are not offered; this does not limit your rights for faulty products under Australian Consumer Law.
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.
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. If you are unsure, contact our team before ordering and we can help you choose.
How do I check availability?
Select your required options, such as colour and size, to see availability for that variation. If an item is marked “Available to order”, check the estimated dispatch information. Please contact us before ordering if you need gear by a particular date.
When will my order be dispatched?
Orders are usually dispatched within 1–3 days, subject to stock availability. Available-to-order and special-order products may take longer. 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?
We offer a 30-day exchange policy on most unused products within Australia, subject to eligibility. Contact us with your order number before returning an item. Read the exchange 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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