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Cressi MC9 first stage showing the alternative Yoke and DIN connections

Cressi MC9 Yoke 232 bar first stage regulator

Cressi MC9 DIN 300 bar first stage regulator

Cressi MC9 First Stage Only

$379.00 inc. GST

A compact, Italian-made hyper-balanced diaphragm first stage with two HP and four LP ports. Choose Yoke (232 bar) or DIN (300 bar).

First stage only — one unit in your selected connection. Second stage, octopus, gauges and hoses are not included.

Colour: Black / Silver

Regulator Connection

Clear

Cressi MC9 First Stage Only

The Cressi MC9 is a compact, Italian-made first stage for building or replacing a compatible warm-water regulator setup. Its hyper-balanced diaphragm mechanism manages the air supply as cylinder pressure changes, while two high-pressure and four low-pressure ports give you room to connect your gauges, second stages and inflator hoses.

Supplied as one first stage only in your selected connection: Yoke or DIN. Second stage, octopus, gauges and hoses are not included. The main photo shows the available connection options.

Features and benefits

Hyper-balanced diaphragm. Helps maintain a consistent intermediate-pressure supply as cylinder pressure falls, supporting the performance of a compatible second stage.
Six hose ports. Two 7/16-inch UNF high-pressure ports and four 3/8-inch UNF low-pressure ports allow you to arrange the instruments and hoses required for your setup.
Nickel-plated brass body. The compact metal body combines corrosion resistance with an elastomer cover to help protect it during handling.
Serviceable internal components. A removable AISI 316 stainless-steel high-pressure seat and conical filter support maintenance by an authorised technician.
Choice of cylinder fitting. Select the 232 bar Yoke version or the 300 bar DIN version to match your cylinder valve and equipment.

Setup and compatibility

Yoke uses a clamp fitting; DIN screws into a compatible cylinder valve. Choose the connection and pressure rating that match your cylinder. Have the first stage, compatible second stage and hoses assembled and checked by a qualified regulator technician. The usable pressure of the complete system is limited by its lowest-rated component.

The standard MC9 is a warm-water first stage for water above 10°C. Choose equipment rated for your intended diving conditions.

Care, rinsing and storage

Clean the MC9 as part of a correctly assembled regulator system. Following the regulator manual, connect the system to a securely supported cylinder and keep it pressurised while rinsing the first stage, second stages and hoses in fresh water. This helps prevent water entering the internal air passages.

Dry the first stage and cylinder connection before closing the valve, releasing pressure and disconnecting. Fit a clean, dry dust cap and let the regulator dry in the shade. Store it in a dry place, with hoses loosely curved and protected from sharp bends.

Inspect hoses and connections before diving. Arrange servicing with an authorised Cressi technician according to the manual, or sooner if the regulator leaks, is damaged or its performance changes. Internal adjustments and repairs require a qualified technician.

Technical Specs

Cressi MC9 First Stage Only technical specifications
Brand	Cressi
Main model / configuration	Cressi MC9
Product type	First-stage regulator component
Regulator type	First stage only
Regulator connection	Din, Yoke
First-stage design	Hyper-balanced diaphragm
High-pressure ports	2 × 7/16 in UNF
Low / medium-pressure ports	4 × 3/8 in UNF
Environmental sealing	No – standard MC9
Cold-water suitability	Warm water above 10°C
Intermediate pressure	10 bar
First-stage materials	Electroless nickel-plated brass
Colours / options	Black / silver
Colour family	Black
First-stage weight	DIN: 450 g; Yoke: 590 g
Connection pressure rating	DIN: 300 bar; Yoke: 232 bar
Included equipment	One MC9 first stage in the selected Yoke or DIN connection
First-stage flow rate	4500 L/min (manufacturer specification)

First stage details

High-pressure seat	Removable AISI 316 stainless steel
Country of manufacture	Italy
Yoke SKU	HZ820097
DIN SKU	HZ820098

One first stage only, in the selected connection. Second stage, octopus, gauges and hoses are not included.

Based on Cressi product information.

Weight	N/A
Regulator Connection	Din, Yoke

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.

Read our full shipping and delivery information →

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.

Read our full returns and exchanges policy →

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.

View collection details and opening hours →

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?

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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