Gas water heater

The utility model provides a gas water heater, mainly by the storage water tank, first water valve, the second water valve, the drain pipe, the water heater is constituteed, the water heater provides the air supply by gas pipeline or gas jar, be equipped with a three -way valve on the outlet pipe of water heater, an export links to each other with the shower through first water valve, an export links to each other with the storage water tank through the second water valve, open earlier the second water valve before the shower, the cold water that lets flow earlier stage flows in the storage water tank, after the temperature reaches the shower requirement, open first water valve again and close the second water valve, it all is the hot water that is fit for the shower to make the water that the shower flows, the waste of water has been reduced.