Unpressurized Solar Energy: 1.High Quality And Long Life 2.Competitive Price 3.Environment Friendly 4. ... Sensor,Controller,Electrical Elements,etc.Features:1.Pipeline Is Made Of All Red Copper And Conducted By Heat Transfer Medium Liquid ... .2.Temperature Preservation Is Equipped With Standard Electric Water Heater Setting,Automatic Temperature Control Exchanger,And Increase Anode Magnesium ...