GC4B/39 Gas Connector Hose (39") - Male Fitting to 1st Stage End - Series B - 2024 on

GC4B/39 - Gas Connector Hose (39"/99cm) - Male Fitting to 1st Stage End (3/8th UNF male) – Series B - March 2024 on

The GC4/39 is one of the hoses in the new High-Flow, Dry-Connect-Underwater, Gas Connector System. *

The GC4/39 is suitable for feeding gas from an off-board cylinder to the rebreather manifold.

The 3/8" UNF end is connected into a spare port on the rebreather manifold. (Note: The gas flows from the male end towards the 3/8" UNF end.)

This allows off-board gas to be plugged in to the male connector to feed whatever the manifold is connected to: ADV, OCB, Auto Air or other OC bailout etc.

[NOTE: The GC4B/39 hose can be shortened to preference, by unscrewing one of the reusable end fittings and cutting the hose to the required length. The end can then be re-fitted. See the Hose Shortening instruction video on this site.]

* Launched in March 2024 the AP Gas Connector System (Series B) is a new and improved system that replaces the previous GCS (Series A).

PLEASE NOTE: The B Series connectors are NOT compatible with Series A connectors (including the Auto Air connector).

Introducing the new high performance AP Gas Connection System:

High-Flow, Dry-Connect-Underwater, Gas Connector System

• The new High-Flow system is rated to EN250 breathing performance down to 50m.

Higher flow is achieved by the mechanical opening of internal valves in both the male & female connectors.

• The new GCS is an Dry-Connect-Underwater system.
• The GCS can be connected underwater with or without pressure in the line.

Both male and female connections feature an automatic closure so that water cannot enter when disconnected and you do not push a slug of water into the hose on connection.

The dry system significantly reduces the probability of a free flow caused by water travelling to the second stage as a mist and then freezing the internals in cold water conditions. A dry environment also reduces internal corrosion increasing the longevity of the products.

• Versatile Quick-Connect System
  
  
• Ergonomic design with easy-grip large collar and knurled rings on the female connector offers a simple push together/pull apart quick connect and disconnect.

• • The GCS male & female connectors are attached to the hose via a standard (9/16" UNF) 2nd stage thread connection and can therefore be fitted to other make hoses with 9/16” regulator fittings.
  • Also available: a GCS Male Connector with a 3/8” UNF Female (GC2B/F) to allow connection to the 3/8”UNF end of other make hoses.

The GCS is a versatile system that can be used in multiple different configurations according to preference and the requirements of the dive, including the ability to plug in a multitude of off-board gas supplies to either the OCB, the ADV or to the rebreather manifold.

IMPORTANT NOTE: The GC3 FLOWSTOP MUST NOT be used in-line with the GCS system for open circuit use as the GC3 will significantly decrease breathing performance.