TUSA RS790 Regulator
Original price was: $1,019.00.$968.00Current price is: $968.00. inc. GST
The TUSA RS790 combines an environmentally sealed R700 balanced diaphragm first stage with a pneumatically balanced S90 second stage. A dry ambient-pressure chamber supports cold-water use, with a Venturi lever and two high-pressure plus four low-pressure ports.
TUSA RS790 Regulator
The RS790 combines the R700 balanced diaphragm first stage and pneumatically balanced S90 second stage. A dry ambient-pressure chamber helps isolate the first-stage mechanism from surrounding water for cold-water configurations.
Features
- R700 first stage with environmental sealing.
- Two high-pressure and four low-pressure ports.
- S90 pneumatically balanced second stage.
- Compact composite second-stage housing.
- Venturi adjustment lever.
Use the approved regulator configuration within the limits in the TUSA manual. Confirm the cylinder connection required before ordering.
Technical Specs
| Brand | TUSA |
|---|---|
| Main model / configuration | TUSA RS790 (R700 / S90) |
| Product type | Regulator |
| Regulator type | Primary Regulator |
| First-stage design | Balanced diaphragm |
| Second-stage design | Pneumatically balanced |
| High-pressure ports | 2 |
| Low / medium-pressure ports | 2 high-flow ports + 2 standard LP ports |
| Environmental sealing | Yes, dry ambient-pressure chamber |
| Cold-water suitability | Below 10°C |
Additional specifications
- The S-90 second stage is a compact pneumatically balanced system that features a composite housing which insulates and protects under extreme cold-water conditions. The S-90 is equipped with a built-in venturi adjustment lever allowing the diver to select a surface or minimum setting reducing possible free flow or a dive setting for maximum airflow during the dive.
First stage (R-700)
- Balanced diaphragm first stage with anti-freeze system
- Dry ambient pressure chamber ideal for temperatures below 50°F/10°C
- Ribbed section to increase heat transfer and resist freezing
- Two H.P. ports and Four L.P. (2 standard/2 high flow) ports
- High flow L.P. ports offer up to 15% increase in airflow
- DIN version available as RS-790 DIN (300 bar/4350psi)
Second stage (S-90)
- Lightweight, compact composite case design
- Pneumatically balanced system
- Venturi adjustment lever
- Ortho-consciously designed mouthpiece
Sources: TUSA 2026 catalogue; Current product information.
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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