Abstract: There is disclosed herein a system for sanitising a fluid pathway in a drinking water dispensing assembly, the system including: a supply of water to be delivered under pressure through the fluid pathway; and a sanitising solution to be dispensed into the fluid pathway via a flow restrictor, wherein the flow restrictor is configured to regulate the flow rate of the solution delivered to the fluid pathway to facilitate mixing between the water and the solution to an effective sanitising concentration within the fluid pathway.