Every Geka-fitting consists of two coupling pieces, which can be used in any combination.
Geka coupling 1/2 inch means, that an 1/2 inch hose with 12.5 mm inner diameter fits to the nozzle of the Geka-coupling.
For an IBC connection you need an adapter from IBC thread to Geka (bayonet) ibc-geka and a counter piece to which you can assemble the hose.
If you want to make the connection capable for fuel or plant oil, you have to replace the black standard rubber seal with a viton seal (geka-viton).
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