campinggaz stove?

I have a grillogaz by campinggaz stove with grill and two rings. The existing regulator screws in to the smaller cylinders of butane and as the regulator I have for a large 7kg cylinger I use on my BBQ is the same pressure, inlet and outlet. can this stove be connected to the large cylinder as its no longer used for camping now I have a caravan. After waiting four days for a reply from campinggaz customer service I've come to the conclusion they have no caring customer service.
Many thanks to repliers.