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Helium Adapter UNDERSEA DIN G5/8 300 Bar
€71.00 tax incl.
( 59,17 € tax excl. )
Availability:
In stock
Reference:
92276
The UNDERSEA 1074-1080BHP adapter connects W21.8x14 female (Type C helium) to DIN G5/8 300 bar female — bridging two incompatible male thread standards in a trimix fill station.
✓ W21.8x14 female (Type C) · DIN G5/8 300 bar female · Rated 300 bar · Precision-machined brass
For helium cylinder-to-manifold connections in technical diving gas management.
Technical diving gas management demands precision at every connection point. UNDERSEA Ltd, a UK-based manufacturer of high-pressure gas equipment supplying the professional diving industry, commercial gas sector and military since the 1970s, assembled the 1074-1080BHP adapter to bridge two internationally recognised thread standards: the W21.8x14 female (DIN 477-6 Type C, the European standard for helium and inert gas cylinders) and the DIN G5/8 300 bar female port found on modern fill whips, manifolds and cylinder valves. The 1080BHP body — rated for full 300 bar high-pressure DIN service — houses the 1074 insert to deliver a reliable dual-female pass-through in a single machined assembly.
Technical specifications
- Manufacturer reference: 1074-1080BHP (assembled: 1080BHP body + 1074 insert).
- Connection A: W21.8x14 female — DIN 477-6, Type C (helium and inert gases).
- Maximum working pressure: 300 bar.
- Material: precision-machined brass.
- Dimensions: 100 x 50 x 50 mm.
- Weight: 900 g.
- Manufacturer: UNDERSEA Ltd, Watford, UK.
Recommended uses
The 1074-1080BHP is used wherever a W21.8x14 male connector — typically a helium industrial cylinder valve or the male termination of a fill hose — must couple with a DIN G5/8 300 bar male port on a fill whip, manifold or cylinder valve. Core applications include partial-pressure trimix (He/N2/O2) and heliox (He/O2) blending at fixed or portable fill stations, helium decanting between high-pressure storage cylinders, and multi-gas panel assembly for technical dive centres. From deep wreck diving in the North Sea to cave exploration in Florida's spring systems, robust helium filling infrastructure relies on precision-engineered adapters of exactly this type — an area where UNDERSEA has been the professional default for decades.
Key strengths
- Female-to-female bridge: couples two incompatible male connectors of different thread standards without any additional intermediate adapter, streamlining fill station plumbing.
- 300 bar rated: engineered for the highest pressures encountered in technical diving, with no derating required for 15 or 20-litre HP cylinders.
- UNDERSEA assembled quality: 1080BHP body and 1074 insert machined and bench-tested as a single unit, delivering consistent sealing performance across repeated pressure cycles in demanding professional environments.
- Helium-specific thread geometry: W21.8x14 Type C does not accept air or oxygen fittings, providing physical gas segregation and fill safety at the hardware level.
- Worldwide professional reference: UNDERSEA fittings equip commercial dive operations, military underwater support units and technical diving centres on every continent.
Warranty and documentation
Manufactured by UNDERSEA Ltd (Watford, UK), a specialist in high-pressure gas equipment for professional diving and industrial gas applications since the 1970s. This adapter is intended for helium and inert gas service (W21.8x14 Type C) only; oxygen service requires prior oxygen-clean certification of all components in the assembly. For UK technical diving gas management standards and guidance, refer to the British Sub-Aqua Club (BSAC) technical diving resources. com).
92276
Data sheet
- Connection
- DIN G5/8 300b Female
- Connection
- Helium Female (Type C)
Specific References
- Manufacturer reference
- 1074
The UNDERSEA 1074-1080BHP adapter connects W21.8x14 female (Type C helium) to DIN G5/8 300 bar female — bridging two incompatible male thread standards in a trimix fill station.
✓ W21.8x14 female (Type C) · DIN G5/8 300 bar female · Rated 300 bar · Precision-machined brass
For helium cylinder-to-manifold connections in technical diving gas management.
