Cressi AC5 Zen Regulator

Original price was: $629.00.Current price is: $511.20. inc. GST

Cressi AC5 Zen Regulator. Simple piston first stage with the compact Zen for warm-water diving.

Colour: Black / Red

Type

Clear

Cressi AC5 Zen Regulator

The AC5 and Zen pair a straightforward piston first stage with Cressi’s compact Zen second stage. Designed for warm-water diving, the combination suits divers who want simple controls and a low-bulk recreational regulator.

Features and benefits

Straightforward first stage. Unbalanced piston uses a conventional mechanism in the listed regulator configuration.
Venturi control. Select the appropriate setting for surface handling or diving to help manage free-flow tendency.
Connection options. 1 × 7/16 in UNF HP ports and 4 × 3/8 in UNF LP ports support the stated gauge and hose configuration.

Setup and compatibility

Connection: DIN, Yoke. Choose the fitting that matches your cylinder valve and its pressure rating. Intended for warm-water use above 10°C. The AC5 and Zen configuration includes the primary first and second stages; an octopus is purchased separately.

Technical Specs

Cressi AC5 Zen Regulator technical specifications
Brand	Cressi
Main model / configuration	Cressi AC5 / Zen
Product type	Regulator
Regulator type	Primary Regulator
Regulator connection	Din, Yoke
First-stage design	Unbalanced piston
Second-stage design	Standard downstream
High-pressure ports	1 × 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 — contact us for the weight of your exact configuration.
First-stage weight	DIN: 435 g; INT/yoke: 600 g
Second-stage weight	149 g without hose
Connection pressure rating	DIN 232 bar; INT/yoke 232 bar

Additional specifications

2nd stage weight (without hose)	149 g

Unique to Cressi is the AC5’s external 1st stage IP adjustment system. This allows service centres to fine-tune the intermediate pressure while the regulator is attached to the cylinder, providing a quick fix to keep it in use until the next service interval. The high-capacity conical filter, which offers a larger surface area than traditional flat filters, traps impurities before they damage the internal components of the 1st stage.
Balanced Diaphragm First Stage For Reliable Performance
Optimized Airflow For Effortless Breathing At Any Depth
Adjustable Venturi Effect For Personalized Breathing Resistance
Certification EN 250/2014 A over 10°
EN 250 A > 10°C
The unbalanced piston 1st stage is simple, dependable and easy to maintain.
1 7/16” HP ports UNF
4 3/8” LP ports UNF
Adjustable venturi maximises airflow in dive mode and prevents free-flows when the regulator is on the surface.
Large purge button is easy for new divers to use.

Based on Cressi product information.

Type	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.

Read our full shipping and delivery information →

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.

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.

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.

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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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