Does anyone know what brand the Jetta’s all-copper heater water tank is? Please see the picture.

There is a certain technical basis for choosing copper tubes for Jetta heating water tanks. Soak the aluminum tubes and copper tubes in oxalic acid for 24 hours. The aluminum tubes will be corroded, while the copper tubes will be brighter. There is almost no corrosion. This is why everyone chooses copper pipe Jetta heating water tank. The retail price is 110 yuan/piece.