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Content: Setting up the  Regulators
The first stage regulator drops the tank pressure (3500+/-  PSI) to 100 to 150 PSI. This depends what brand of regulator you buy. Each brand  has its own designed working pressure. For this reason, I buy two of the same  make and model regulator units. I will  start by calling the Regulator assembles Octopus units. An Octopus is made up by a first stage regulator, second  stage regulator, high pressure hose with gage and a BCD inflator hose. You will need to add a second BCD inflator  hose to one of the octopus units. Air Balance Process
This Air balance System connects the tank systems together at the low pressure side. Diving on Dual Tanks
Start with the Octopus unit with  the second BCD inflator hose. This Octopus unit is please on the tank that is  on the same side of the BCD inflator value.