Evacuated Tube Pressurized Solar Water Heater 1)CCC,CE,ISO9001,ISO14001 2)3 years warranty ... hydraulic pressure: the hydraulic pressure is same as tap water, it is very suitable for tired person.4. Economical ... copper coil is installed inside the the tank as the heat exchanger the heat of the water in the tank via ... layer55mm polyurethaneMOQnegotiation 2012 Evacuated Tube Heat Pipe Solar Water Heater