? NOTE: 1.It is recommended to connect the water heater with a cross-sectional area of ?2.5 square millimeters and connect it to a travel switch of 32a or above. 2.The water heater needs to work after the water pressure reaches 0.04~0.4MPA. When using the instant water heater, make sure the water pressure is stable and do not turn off the switch multiple times. If the water pressure is unstable, you can solve it by increasing the height of the water tank or using a booster pump. 3.When the water inlet joint of the water heater and the temperature control switch joint are connected, a silicone gasket needs to be placed to prevent water leakage.