Unpressurized Solar Energy: 1.High Quality And Long Life 2.Competitive Price 3.Environment Friendly ... :Electrical Heating,SafetyValve,Magnesium Bar,Temperature Sensor,Controller,Electrical Elements,etc.Features:1.Pipeline Is Made Of All Red ... .2.Temperature Preservation Is Equipped With Standard Electric Water Heater Setting,Automatic Temperature Control Exchanger,And Increase Anode Magnesium ...