We fit gas tanks with valves and pressure gauges to motorhomes. Once the gas tanks are installed in the motorhome, you can fill the gas tanks without leaving the motorhome, without having to disconnect the tanks, and you can fill up at any petrol station in Europe. The gas tanks are connected by a hose, so you can fill both tanks with gas at the touch of a gas pistol. A valve in the cylinders prevents overfilling.