Poseidon Xstream Mk3 First Stage – Deep 90° G5/8

The Xstream Mk3 First Stage is a balanced design with Thermo Dynamic Antifreeze (TDA) protection, featuring a rolling diaphragm and a unique ball valve system for effortless breathing performance. The Deep version of the Xstream first stage is factory adjusted for the IP setting required by the Xstream and Jetstream second stages.

This version has five 3/8" LP ports, two 7/16" HP ports, with a G 5/8" BSP (aka "DIN") connector and is Nitrox Ready from the factory.