The Highland Argon Regulator (HL405) is a ultra-compact first stage designed specifically for dedicated drysuit inflation systems. Engineered to deliver reliable, low-flow gas delivery from small argon cylinders, this specialized first stage keeps your suit inflation system streamlined and completely independent of your primary back-gas supply.

Precision-machined from chrome-plated brass, the HL405 features a built-in over-pressure relief valve (OPV) for enhanced safety when using small cylinders. Its compact profile prevents snagging, making it a trusted choice for technical, cave, and cold-water drysuit divers who demand maximum thermal insulation.

Key Features & Specifications

• Dedicated Inflation Design: Engineered specifically for drysuit argon systems to provide reliable, low-volume gas flow.
• Integrated Over-Pressure Valve (OPV): Pre-installed safety relief valve protects your low-pressure hose and drysuit inflator from over-pressurization.
• Ultra-Compact Profile: Minimizes bulk and reduces snag hazards when mounted to a pony or argon cylinder strap.
• Durable Construction: Heavy-duty chrome-plated brass body designed to withstand harsh cold-water environments.
• Standard Porting: Features low-pressure (LP) and high-pressure (HP) ports for connecting inflation hoses and mini SPGs.

Technical Specifications Table