Various methods and systems are provided for controlling a supply of medical gas to a gas delivery system, such as an anesthesia machine, via a medical gas delivery module. In one example, a method includes supplying a medical gas from a pipeline gas supply source to a gas delivery system via a first conduit, measuring a quality of the medical gas in the first conduit, comparing the measured quality to an allowable range, switching to an alternative gas supply source for supplying the medical gas to the gas delivery system and communicating a pipeline gas supply fault in response to the measured quality being outside of the allowable range, and continuing supplying the medical gas to the gas delivery system from the pipeline gas supply source in response to the measured quality being inside of the allowable range.