Xstream Octopus Delivered with a 90 cm / 35,4 inch LP hose. May only be used with a 1st stage that has a built in over-pressure valve. Hose connection to the 2nd stage: 9/16 Did you know... Whilst some manufacturers market the Octopus as a cheaper product, a Poseidon Octopus is always of the same quality and materials as our regular second stages.