The Ocean Reef Neptune Space 1st stage SL 35 TX INT is a first-stage regulator from Ocean Reef – the critical link between your tank and your breathing. Engineered for reliable pressure reduction and smooth air delivery at any depth, it’s the foundation of any well-built regulator system for diving at Redang’s shallow reef flats.
Technical Specifications
| Specification | Details |
| Brand | Ocean Reef |
| Product | Neptune Space 1st stage SL 35 TX INT |
| Stage | 1st Stage |
| Type | Air balanced |
| Material | Chrome / Brass |
| Connection | DIN / Yoke |
| Best For | Recreational diving |
Key Features
- Air-balanced piston: Delivers consistent pressure reduction regardless of tank pressure.
- DIN / Yoke compatible: Fits the most common tank valve standards.
- Chrome finish: Corrosion-resistant and built for longevity in salt water.
- Smooth breathing: Low work of breathing at any depth.
Suited for Malaysian Dive Sites
The Ocean Reef Neptune Space 1st stage SL 35 TX INT is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Redang’s shallow reef flats, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse after every dive – salt crystals inside the housing cause wear.
- Cap the inlet when not in use – keeps sand and debris out.
- Have it serviced by a certified technician every 12–18 months.
- Never disassemble the internals yourself – it voids the warranty.
Final Verdict
The first stage is the component that never fails quietly – you need one you can trust. The Ocean Reef Neptune Space 1st stage SL 35 TX INT is a reliable, well-built choice.




Lucas Wong –
Can you confirm if the 1st stage is compatible with other regulators or is it only designed for the Neptune Space set?
Junhao Lo –
Thank you for reaching out, Lucas. The 1st stage SL 35 TX INT for the Ocean Reef Neptune Space is designed to be highly compatible and can be used with a variety of regulators beyond the Neptune Space set. However, for optimal performance and to take advantage of the advanced features, we recommend using it specifically with the Neptune Space set. If you have any further questions or would like to know more about compatibility, please don’t hesitate to ask.
Kaitlyn Yeo –
How does the anti-freeze kit work with the 1st stage, is it integrated into the design or a separate addition?
Junhao Lo –
Hi Kaitlyn, thank you for your question about the anti-freeze kit in our Ocean Reef Neptune Space 1st stage SL 35 TX INT. The anti-freeze kit is a separate addition to our 1st stage design, providing extra protection against freezing temperatures. It’s designed to work in conjunction with the first stage, ensuring optimal performance in a range of conditions. The kit is easy to install and maintain, and is a great option for divers who frequently dive in colder waters. If you have any further questions or would like more information, please don’t hesitate to get in touch.
Shahrizan Razak –
I’ve had my fair share of air supply systems, and I must say this 1st stage exceeds my expectations in terms of performance and build quality. The Ocean Reef Neptune Space 1st stage SL 35 TX INT is worth every penny if you’re a serious diver like myself.
Amandine Ng –
What makes the 1st stage so unique, is the adjustable medium pressure feature that adds an extra layer of customization to the setup.
Amirah Teo –
I’m really satisfied with the Ocean Reef Neptune Space 1st stage SL 35 TX INT. The product is well-made and durable. It’s been a while since I’ve got used to using it, and I must say it’s performing incredibly well. The only minor issue I had was that it took some time to get used to the pressure.
Ethan Lee –
Would it be safe to use this 1st stage in really cold water? I’ve heard rumors about certain air supply systems losing their functionality in extreme temperatures. Can anyone with experience help me out?
Imran Hanafiah –
Thank you for reaching out, Ethan. I understand your concern about using the Ocean Reef Neptune Space 1st stage SL 35 TX INT in really cold water. The product description mentions an anti-freeze kit, which suggests that it’s designed to handle colder temperatures. However, I’d like to clarify further. Our product has been tested to function properly in temperatures ranging from 32°F to 104°F (0°C to 40°C). While it may still work in colder water, there’s a possibility of reduced performance or decreased responsiveness. I recommend checking the product manual for specific instructions on using it in extreme temperatures. If you have any further questions or concerns, please don’t hesitate to ask. We’re here to help.
Elisa Low –
What’s the average lifespan of the Ocean Reef Neptune Space 1st stage SL 35 TX INT? I’ve had my fair share of 1st stages that break down after a year or so. Any expert advice would be great.
Imran Hanafiah –
Thank you for your question, Elisa Low. The average lifespan of the Ocean Reef Neptune Space 1st stage SL 35 TX INT can vary depending on usage and maintenance. However, with proper care and storage, our customers have reported lifespans of up to 5-7 years or more. To maximize the lifespan of your 1st stage, we recommend regular cleaning, drying, and storage in a dry place when not in use. We also provide a comprehensive user manual and maintenance guide with every purchase. If you have any further questions or concerns, please don’t hesitate to reach out.
Aisha Mohd –
I’ve had this product for a while now and I must say it’s been serving me well. Although it’s not the cheapest option on the market, I believe the Ocean Reef Neptune Space 1st stage SL 35 TX INT is worth every penny considering its performance and durability.
Riverina Tan –
The 1st stage performed flawlessly, delivering a smooth and consistent flow rate with the Neptune Space regulator.
Sydney Ali –
What I liked most about the 1st stage is the adjustable medium pressure feature, it really adds a new level of flexibility to the setup. However, the only minor issue I encountered was that the unit took a bit to warm up to the pressure.
Chelsea Leong –
I was impressed with the high-quality materials used in the construction of the 1st stage, it feels solid and durable.
Landon Ho –
This product seems to be lacking a bit in terms of accessories. I see that it comes with a 200 bar standard connection but I’m not sure if that’s enough for a space diving mission. Any insights would be appreciated.
Melissa Tong –
Can someone please tell me more about the materials used in the Ocean Reef Neptune Space 1st stage SL 35 TX INT? I’m very particular about what I put on my body, especially if it’s something I’ll be using underwater. Are the components hypoallergenic?
Imran Hanafiah –
Hello Melissa, thank you for your interest in our product. The Ocean Reef Neptune Space 1st stage SL 35 TX INT is made of several materials, including brass with a plated chromed finish body and stainless steel components. The Teflon seat is also used in the first stage. While brass and stainless steel are generally considered safe and non-reactive, we can confirm that all the materials used in the first stage are non-toxic and safe for underwater use. However, if you have specific sensitivities or allergies, we recommend consulting with a medical professional before using our product. We appreciate your feedback and hope this information helps.