Gas water heater

The utility model discloses a gas water heater, which comprises a heat exchanger, a water inlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with the heat exchange water inlet; the water outlet pipe is connected with the heat exchange water outlet; two ends of the bypass pipe are respectively communicated with the water inlet pipe and the water outlet pipe; and the regulating valve is arranged on the bypass pipe, and the regulating valve is used for automatically regulating the water flow in the bypass pipe according to the water inlet pressure. The water flow in the bypass pipe can be automatically adjusted according to the water pressure, so that condensate water can be effectively prevented from corroding the heat exchanger and influencing the combustion working condition, and the service life of the water heater is prolonged. 本实用新型公开了一种燃气热水器，包括：换热器，具有换热进水口及换热出水口；进水管，与所述换热进水口连接；出水管，与所述换热出水口连接；旁通管，所述旁通管的两端分别与所述进水管及出水管连通；调节阀，设置在所述旁通管上，所述调节阀用于根据进水压大小