This kit is suitable for the XTX50 & XTX40 regulator 1st stages (DST type) and cannot be used on other Apeks 1st stages. It has been developed to offer another position for hose routing for technical divers. This hose position is preferred by some divers. Your local Authorized Apeks Dealer can upgrade a new or existing DST 1st stage to include this feature.
5-Port Upgrade Kit
5th port allows for a hose routing options that can be advantageous when mounting the first stage to twin cylinders
Heat exchanger helps resist freezing in cold water
High polished chrome plating over marine brass
This kit cannot be retrofitted to any of the old XTX first stages, it can only be fit to new XTX200 and XTX100 first stages which use the metal decal. This is specified in the kit instructions.