Hose nozzle Bullnose (EU) male - G1/4 male

UNDERSEA, a UK manufacturer with documented expertise in gas supply components for professional dive centre infrastructure, offers ref. 1221 — a purpose-built fill station fitting connecting the valve outlets of French and continental European oxygen storage cylinders to the G1/4 BSPP male thread standard used across fill whips, manifold blocks, and distribution panels. This connector geometry is distinct from and mechanically incompatible with the UK Bullnose standard (BS 341 Part 1), specific to B20/B50 type storage cylinders of the French and continental European market. Unlike off-the-shelf industrial brass fittings, this component is assembled to order by UNDERSEA and engineered for continuous professional oxygen service at 300 bar — oxygen-clean construction, no improvised substitution.

Technical specifications

• Manufacturer reference: 1221
• Cylinder side connection: Euro Bullnose male (French and continental European storage cylinders)
• Outlet side: G1/4" BSPP male (fill whip or panel fitting)
• Working pressure: 300 bar
• Material: Brass, oxygen-compatible
• Compatible cylinders: B20, B50 and EU-standard outlet storage cylinders (French and continental European market)
• Market: France and continental Europe (not intended for the UK market — UK Bullnose standard is incompatible)
• Availability: assembled to order (PART ASSEMBLED TO ORDER) — 2–3 working days

Recommended uses

This fitting integrates into oxygen, nitrox, and trimix fill stations at professional dive centres, dive clubs, and gas blending workshops using French or continental European storage cylinders with the appropriate outlet standard. It fits manifold assemblies, distribution panels, cascade storage banks, partial-pressure nitrox blending systems, and cylinder-to-cylinder decanting rigs. The G1/4 BSPP male outlet provides direct compatibility with UNDERSEA fill whips (US/AU equivalent: charging hoses), hex blocks, isolation valves, and flow restrictors, as well as third-party HP accessories sharing this thread standard. Workshops handling EANx or pure oxygen fills benefit from the oxygen-compatible brass construction.

Key strengths

• Universal G1/4 BSPP male outlet: direct connection to UNDERSEA fill whips (US/AU: charging hoses), manifold blocks, and HP accessories from third-party manufacturers sharing the G1/4 BSPP standard — no intermediary adapters required for integration into existing fill room infrastructure
• Oxygen-compatible brass construction: proven material for high-pressure O2 service, long-term corrosion resistance in humid fill room environments; meets EN 13949 requirements for oxygen-enrichment gas systems
• Technical gas handling standards: dive centres operating EANx or trimix blending workshops to TDI, IANTD, or BSAC technical gas handling guidelines require oxygen-compatible fittings rated to full cylinder working pressure; this component meets the O2 service and pressure requirements for partial-pressure blending and decanting rigs
• 300 bar working pressure: rated for the high pressures of gas storage cylinders at professional fill stations, with adequate safety margin for continuous operation
• B20/B50-specific outlet geometry for the French and continental European market: secure fit on oxygen storage cylinder valves with no risk of mix-up with the geometrically incompatible UK Bullnose standard (BS 341 Part 1) — critical safety margin in an oxygen high-pressure environment

Warranty and product notes

Oxygen-clean brass construction: degreased, rinsed, and hermetically sealed for professional O2 fill station service per EN 13949 and BSAC oxygen-handling protocols. Working pressure: 300 bar (confirmed via UNDERSEA 2026 catalogue, ref. 1086-EBN family). Tool-free alternative: UNDERSEA 1086-EBN (clamp, G1/4 male). UK market: ref. 1220 (UK Bullnose) — refs. 1220 and 1221 are not interchangeable. Proteushop is an authorised UNDERSEA distributor for France and continental Europe.