How many seals are used in Peugeot 307 heater water tank?

Two. According to the product information, Peugeot 307 heater water tank connector has two rubber sealing rings. Generally, after several years, the sealing effect will be lost due to the aging of rubber, and antifreeze will leak at the joint. The hot air tank circulates the coolant in the car. When the temperature of the automobile engine rises. The coolant will also get hot. Heat the car.