T-500SM4P · 0.5L
The mask kit.
With a manual refill option.
The TRIMIX T-500SM4P pairs the T-500 0.5L cylinder and K2 full-face snorkeling mask with a four-stage high-pressure hand pump, hose and oil-water separator. The supplied long zip carry case keeps the kit together between outings.
Choose your cylinder
Select Black or Green. The main image changes to match your exact color and adapter choice.
Add a small adapter
Choose with or without the compact scuba refill adapter. It is a filling accessory, separate from the mask-to-cylinder connector.
Plan for the effort
Hand pumping is physically demanding. It offers a backup filling option; powered or qualified cylinder filling may be more convenient.
What is in this kit?
- T-500 0.5L cylinder with breathing-valve assembly and pressure gauge
- K2 full-face mask and mask-to-cylinder connector
- Four-stage high-pressure hand pump with hose and oil-water separator
- Long zip carry case shown in the configuration photos
- Anti-loss leash, interchangeable snorkel section, silicone mouthpiece and loose connector shown in the kit
- Small scuba refill adapter only with the “With scuba adapter” option
The action camera, large source cylinder and electric compressor are not included. This listing uses the long carry case; the separate non-pump T-500SM listing uses the new mesh bag.
How does this differ from the non-pump T-500SM kit?
T-500SM is the non-pump mask kit with the mesh carry bag. This T-500SM4P listing adds the four-stage high-pressure hand pump, hose and oil-water separator, and uses the long zip carry case shown in the configuration photos. Both adapter choices here include the four-stage pump.
Does adding a refill adapter remove the hand pump?
No. Both adapter choices in this listing include the four-stage pump. “With scuba adapter” adds the small cylinder-to-cylinder refill adapter to the same kit.
0.5L refilling guide
Three ways to refill your T-500.
Choose a refill method before choosing your kit. A compatible electric compressor, a scuba refill adapter or a high-pressure hand pump can provide different levels of convenience and effort.
Electric compressor
Approx. 10 minutes*
A powered filling option with less manual effort. Use compatible high-pressure equipment that supplies breathing-quality air and the filtration required by the T-500 manual. Monitor the equipment and pressure throughout filling.
Scuba refill adapter
Approx. 16 seconds*
Transfers air from a compatible, adequately pressurized source cylinder. Source pressure, cylinder capacity and the valve connection affect the result. This is a controlled transfer, not a timed challenge.
High-pressure hand pump
Approx. 25 minutes*
Requires sustained physical effort and is the slowest option in these reference estimates. Useful as a backup where powered filling is unavailable. Use the specified filtration and follow the pump’s work/rest instructions.
Illustrative refill setups featuring the Black TRIMIX T-500. Confirm compatibility with your actual filling equipment.
*Merchant-provided reference estimates for a 0.5L cylinder filled from 0 to 20 MPa / 200 bar. These are not guaranteed fill times or recommended filling rates. Actual results depend on equipment, source pressure, temperature and operator pace. The video below does not verify these estimates. Follow the cylinder markings and equipment instructions; never exceed the permitted pressure.
See the small adapter connection.
This demonstration shows a compact clamp-style adapter connecting a large source cylinder to a small cylinder, followed by isolation, pressure release and disconnection.
Use this merchant-supplied clip as a connection reference. Confirm compatibility with your actual equipment.
Small scuba refill adapter
This is the compact adapter offered with the 0.5L kits, separate from the K2 mask connector and the larger adapter used in our 1L and 2L listings.
- Working pressure
- 20 MPa / 200 bar
- Cylinder-side fill connection
- 8mm quick coupling
- Materials
- Stainless steel and aluminum alloy
- Finish
- Anodized surface
- Overall size
- 13.7 × 6.3 × 2.5 cm
- Net weight
- Approx. 0.25 kg
Adapter specifications are supplied by the merchant. An 8mm connection alone does not establish source-valve compatibility. Send us a photo or specification of your source valve before ordering.
What should I check before using a refill adapter?
- Have a qualified fill provider confirm that the source cylinder, valve, adapter and receiving cylinder are compatible and in serviceable condition. Use breathing-quality compressed air.
- Follow the adapter instructions to secure the connection and connect the receiving cylinder. Check seals, fittings and the gauge before starting.
- Control and monitor the transfer. Stop within the pressure limit marked on the receiving cylinder; stop immediately if there is a leak or malfunction.
- Close the source valve, release trapped adapter pressure as directed and confirm that the connection is depressurized before disconnecting. Never loosen a pressurized connection.
This overview does not replace the full cylinder, adapter or filling-equipment instructions. Arrange qualified instruction before filling.
Check the selected kit’s packing list. A source cylinder and electric compressor are not included. A hand pump is supplied only with pump-kit listings; the small refill adapter is included only when the corresponding option is selected.
T-500 manual & essential guidance
Get to know your cylinder before use. Read the complete multilingual user manual, including its English section.
Cylinder guidance only: This is the manual for the T-500 cylinder, not the K2 mask, adapter or hand pump. Follow separate instructions for every component; the complete setup must stay within the most restrictive component limit.
- Normal-use depth
- Less than 10 m
- Maximum pressure
- 200 bar / 20 MPa
- Water temperature
- Above 10°C
- Use suitable breathing air. The manual requires breathing-quality compressed air and prohibits pure oxygen. Use compatible filling equipment and a qualified fill provider.
- Check before every use. Do not fill or use equipment that is damaged, leaking or malfunctioning. Follow the manual’s checks for water or foreign material in the breathing cavity.
- Care for it after use. Clean with fresh water as directed, dry before storage and keep it away from sunlight, high heat and impacts. Arrange annual professional inspection or maintenance.
Why does the manual also mention 30 m?
The normal-use depth in section 1.1 is less than 10 m. The reference to depths within 30 m is only for emergency rescue or a backup air supply for professional diving equipment. It is not a recreational depth rating. Stay within your training and the limits of the complete setup.
How long will a fill last?
The manual does not promise a fixed runtime. Depth, breathing rate, activity, starting pressure and the air reserve in your dive plan all affect available breathing time. Monitor the gauge and plan the return and ascent with sufficient air.
What are the storage and service requirements?
The manual specifies storage at 5–30°C and 40–70% relative humidity, away from sunlight, heat and harmful chemicals. It calls for annual professional inspection or maintenance and cylinder hydrostatic testing every five years. Have a qualified provider confirm the schedule required by the cylinder markings and local rules. Do not attempt unauthorized disassembly.
Find this manual in Tutorials · Read the cylinder FAQs · Download the PDF
Source: T-500 user manual, sections 1, 4, 6 and 7. Cylinder markings, the full manual and applicable training requirements govern use. These notes are not a substitute for scuba training or a dive plan.
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