OmniSwivel Adapter for Poseidon Xstream Female to 9/16" Male Adaptor, with built-in Pressure Relief Valve
Older Poseidon Xstream 1st stage regulators did not have an OPV in the 1st stage. The relief valve was in the 2nd stage hose. If the user wanted to use a standard 9/16" hose vs. the standard Poseidon hose, an adapter would be needed for the 2nd stage. The user would also need to add an OPV to the 1st stage.
This OmniSwivel Adapter has the OPV built in. Now you can use a standard 2nd stage SCUBA hose and not have to add an OPV to your Poseidon 1st Stage.