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About Sub Gear SG500 Regulator

The Sub Gear Bonaire Regulator is a High Performance Balanced Diaphragm First Stage Regulator with Dry Chamber for all temperatures, including cold or murky water. The Bonaire First Stage Regulator is the perfect choice for the recreational diver who wants the advantage of a diaphragm first stage for use in temperate waters. Bearing in mind that regulators generate temperatures as low as minus 22°F (-5.5°C) due to the incredibly fast moving air and the pressure drop involved, it is imperative that sensitive moving metal parts avoid contact with extremely cold water or debris. Therefore, diaphragm first stages have been the favored choice of cold-water divers and those working in contaminated or muddy water. Sub Gear's diaphragm first stages feature balanced technology and are packed with features resulting in ultra fast flow to the second stage on demand and a fantastic overall performance.

The Bonaire first stage's streamline body is constructed of machined marine-grade chromed brass. The First Stage has a balanced diaphragm to offer you peace of mind with its smooth breathing mechanisms and maximum performance that don't diminish as your tank's air pressure changes. First-Stage Regulator is equipped with two HP and four LP Ports 2 of which are High Flow Ports (HFP), is Nitrox Ready Up to 40% and weigh's 30 oz (850 g).

The Second Stage also incorporates a fail-safe downstream demand valve which is simple, yet efficient. The Bonaire has a reversible hose attachment, which means it will accommodate your regulator set up configuration needs. The Bonaire's streamline design, minimal weight 6.1 oz (174 g) w/o hose, and orthodontic silicone mouthpiece mean jaw fatigue and pain won't be a hindrance for you breathing from the second stage regulator. The streamline shape also means the experience of gear drag is a thing of the past. Clearing the regulator is made easy with the high-flow purge valve. The Second Stage is also equipped with a Diver Adjustable Venturi to minimize free-flow and enhance breathing. Complete regulator weighs 36.1 oz (1,024 g) without the hose and comes with an Owner's Manual.

Sub Gear SG500 Regulator Features

  • High Performance Regulator System
  • Nitrox Ready Up to 40%
  • Total Weight: 36.1 oz (1,024 g) without hose
  • Owner's Manual
  • First Stage:
  • Balanced Diaphragm 1st Stage Design
  • Chrome Plated Brass Body
  • Multiple LP Ports, 2 HFP, 2 SFP
  • 2 HP Ports
  • Compact Streamline
  • Cold Water: Anti-Freeze Protection & Dry Chamber
  • Second Stage:
  • Fail-Safe Downstream Demand Valve
  • Reversible Hose Attachment
  • Streamline Design
  • Orthodontic Silicone Mouthpiece
  • Reduced Jaw Fatigue, Added Comfort
  • High-Flow Purge Valve
  • Diver Adjustable Venturi

Sub Gear SG500 Regulator Specifications

1'St Stage Type
Balanced Diaphragm
Lp Ports
Hp Ports
Adjustable 2'Nd Stage
Yes, Venturi
Nitrox Compatible
Yes Up To 40%
2'Nd Stage Type
Downstream Demand Valve
First Stage: Chromed Brass, Second Stage: Plastic And Silicone Rubber
Total Weight
36.1 Oz (1,024 G) Without Hose
Mfr #

Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Is the 1st stage the same for the Cayman and the Bonaire?
Michael C  No all 3 1st stages are different. The Cayman would be the highest performance followed by the SG500, and then the Aruba.
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