My Roman is dry hose and has Zero at top & 10 at bottom. Ascending or descending numbers is not a factor in wet/dry delivery.
Wet/Dry depends on which end of the hose the shut off is located. With dry hose, the shut off is at the base of the cylinder and used the "banana" nozzle. The hose is dry at beginning and end of fuel delivery. Wet hose will have a shut off incorporated in the nozzle. The hose is wet (full) at the beginning and end of fuel delivery.