Condensation drainage device and gas heating water heater

The utility model provides a condensate drainage device and a gas heating water heater, and belongs to the technical field of condensate water seals. The condensation drainage device comprises a shell, the shell comprises a top wall, a bottom wall, a side wall and a partition wall, a cavity is defined by the top wall, the bottom wall and the side wall, the partition wall is arranged in the cavity and connected to the bottom wall and the side wall, and the partition wall extends towards the top wall and divides the cavity into a first cavity and a second cavity which communicate with each other; the water inlet pipe penetrates through the top wall and extends into the first cavity; the water inlet pipe detection electrode is arranged on the top wall, extends into the water inlet pipe and is used for detecting the liquid level in the water inlet pipe. According to the embodiment of the invention, the water inlet pipeline extends into the first cavity to form the flow channel for water sealing, the liquid level