Nautilus Bypass Piston First Stage Regulator – Simple. Reliable. Built for Adventure.

The Nautilus Bypass Piston First Stage Regulator is a rugged, no-nonsense workhorse designed to deliver smooth, dependable air flow in a wide range of diving conditions. Featuring a classic flow-by piston design, this first stage offers high reliability and minimal moving parts, making it ideal for recreational divers, rental fleets, and entry-level setups.

Constructed from 316 Marine Grade Stainless Steel, the Nautilus first stage resists corrosion and performs reliably even after repeated exposure to saltwater and sand. Its simple internal design ensures long service life, low maintenance, and consistent intermediate pressure delivery—whether you're diving locally or travelling the tropics.

Key Features:

Flow-By Piston Design – Proven performance with minimal moving parts for superior reliability

Yoke or DIN Configurations Available – Compatible with a wide range of cylinder valves

316 Marine Grade Stainless Steel Body – Tough, corrosion-resistant, and built to last

Low Maintenance Architecture – Ideal for dive schools, rental programs, or personal use

Multiple LP and HP Ports – Flexible hose routing for a clean and efficient setup

Compatible with Nautilus Second Stages – Pair with the Nautilus FS-FTP or Octopus for a full system

Smooth, Consistent Airflow – Balanced performance at depth or on the surface

Whether you're gearing up new divers, maintaining a reliable rental fleet, or seeking a straightforward and serviceable first stage, the Nautilus Bypass Piston First Stage Regulator offers trusted performance without the frills.

Now available at Oceano Dive Centre – simplicity, reliability, and value, all in one first stage.