... SafetyValve,Magnesium Bar,Temperature Sensor,Controller,Electrical Elements,etc.9.Copper Heat Pipe:Heat Pipe Tubes,Thickness:0.6mm,And ... solar water heater Features:1.Ppeline Is Made Of All Red Copper And Conducted By Heat Transfer Medium Liquid.2.Temperature Preservation ... Anode Magnesium Bars Sticking To Prevent Furring.3.The Insulating Layer Uses Polyurethane Bulk And Has A Good Effect Of ...