Hollis Scuba Diving H-O2 First Stage Regulator - Silver

The Hollis HP5 non-balanced flow-by piston first stage is equipped with a bulletproof design, which is certified for up to 100% oxygen service. This is made possible by the implementation of highly specialized component materials and manufacturing processes. The first stage is cleaned and assembled in a clean room environment, using specially designed materials and halocarbon based lubricants. It is also color-coded for easy identification.

The flow-by piston design sets this first stage apart as the only true fail-safe design on the market. In the event of an unexpected malfunction of the high-pressure seat, the piston will automatically move downstream from the high-pressure air coming from the scuba cylinder, ensuring a constant gas flow to the second-stage regulator. The first stage regulator weighs 8.3 oz (235.3 g) and is equipped with a DIN hand-wheel connector in oxygen green for easy identification for oxygen-use-only.

This non-balanced flow-by piston is constructed of durable and corrosion-resistant marine-grade chrome plated brass, ensuring its longevity and reliability. With these features and certifications, the Hollis HP5 first stage stands out as a top choice for divers in need of a dependable and safe oxygen regulator.

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