The DuoControl is a gas pressure regulator and changeover system all in one. This operates in a similar way to the DuoComfort but can not be used while driving.  The DuoControl also has a test connection point and is  suitable for one bottle systems, automatically changes over to the full bottle when the one being used is empty, bottle status indicator for bottle in use, We recommend that you have this system fitted by an authorise expert.                                                                                  

 NOT FOR USE WHILE DRIVING