Water heater heated by central heat system

The utility model discloses a water heater using heating systems, belonging to the technical field of water heaters, which is characterized in that: a plurality of preheating pipes are arranged in a water tank casing, and a hot water outlet pipe and an inlet pipe are arranged at the lower part of the water tank casing; the preheating pipes are connected in parallel in the branch channel or main channel of the heating pipeline, and conduct heat exchange with the heating system as the heat source. The utility model has the advantages of simple and reasonable structure, safety and reliability, convenient mounting, good application effect, and the capability of meeting the demands for domestic hot water of households in winter and saving expenditures for households; therefore, the utility model is an ideal product for saving energy.