Water tank assembly and gas water heater

A water tank assembly applicable to a gas water heater, wherein the water tank assembly comprises a tank body and a heat exchanger, the tank body comprising a plurality of side plates connected to each other to form a flue gas chamber, the heat exchanger being arranged inside the flue gas chamber and comprising a plurality of heat exchange tubes;

• wherein at least one of the plurality of side plates comprises:
• a first stamping plate;
• and
• a second stamping plate connected to the first stamping plate, the first stamping plate being recessed in a direction away from the second stamping plate to form a first stamping groove, and the second stamping plate being recessed in a direction away from the first stamping plate to form a second stamping groove;
• wherein
• after the first stamping plate is connected to the second stamping plate, the first stamping groove communicates with the second stamping groove to form a first water box, and at least one or more of the plurality of heat exchange tubes are threaded through the first stamping plate to communicate with the first water box.