Liquid gas piping system, comprising: a piping arrangement with a first connection for a first gas source and a second connection for a gas consumer; a flow sensor disposed in the piping arrangement; a gas pressure regulator disposed between the first connection and the flow sensor; a consumption sensor disposed in the piping arrangement and downstream of the flow sensor; a first filling level sensor for the first gas source, preferably a weight sensor for measuring the weight of the first gas source; and a control device; wherein a first portion of the piping arrangement is disposed between the first connection and the flow sensor and a second portion of the piping arrangement is disposed between the flow sensor and the consumption sensor; wherein the flow sensor is configured to transmit to the control device a first signal characterizing a liquid gas flow rate; wherein the consumption sensor is configured to transmit to the control device a second signal characterizing a liquid gas consumption occurring at the second connection; wherein the first filling level sensor is configured to transmit to the control device a third signal characterizing a filling level of the first gas source; wherein the control device is configured to determine, based on the first signal, the second signal and the third signal, whether there is a leak in the liquid gas piping system; and wherein the control device is configured to distinguish between a leak in the first portion of the piping arrangement and a leak in the second portion of the piping arrangement. a piping arrangement with a first connection for a first gas source and a second connection for a gas consumer; a flow sensor disposed in the piping arrangement; a gas pressure regulator disposed between the first connection and the flow sensor; a consumption sensor disposed in the piping arrangement and downstream of the flow sensor; a first filling level sensor for the first gas source, preferably a weight sensor for measuring the weight of the first gas source; and a control device; wherein a first portion of the piping arrangement is disposed between the first connection and the flow sensor and a second portion of the piping arrangement is disposed between the flow sensor and the consumption sensor; wherein the flow sensor is configured to transmit to the control device a first signal characterizing a liquid gas flow rate; wherein the consumption sensor is configured to transmit to the control device a second signal characterizing a liquid gas consumption occurring at the second connection; wherein the first filling level sensor is configured to transmit to the control device a third signal characterizing a filling level of the first gas source; wherein the control device is configured to determine, based on the first signal, the second signal and the third signal, whether there is a leak in the liquid gas piping system; and wherein the control device is configured to distinguish between a leak in the first portion of the piping arrangement and a leak in the second portion of the piping arrangement. wherein the consumption sensor is configured to transmit to the control device a second signal characterizing a liquid gas consumption occurring at the second connection; wherein the first filling level sensor is configured to transmit to the control device a third signal characterizing a filling level of the first gas source; wherein the control device is configured to determine, based on the first signal, the second signal and the third signal, whether there is a leak in the liquid gas piping system; and wherein the control device is configured to distinguish between a leak in the first portion of the piping arrangement and a leak in the second portion of the piping arrangement.