Gas Ring Regulator

I recently purchased a single ring gas burner and it came with a short hose, a regulator and what appears to be a 3/4 inch screw-in connector.

My problem is that I want to connect this burner to a gas bottle mounted on the roof of my cruiser. which will require at least a two metre hose and I am having trouble sourcing such a hose.

I do have a smaller diameter hose (I think it is a primus brand) but it has no regulator, nor does the 2kg bottle it fits.

Does the gas ring need a regulator or is a regulator only required on bottles 4kg and greater?

Can anyone help?

Thanks,

Peter F.