... electric appliances.5)Heating pipes are widely used in showers, water dispensers, boiling, washing machine and various types of heating ... materials: magnesium oxidetube Material: Stainless steel seamless pipe, welded pipe, copper, yellow brass pipe, carbon steel pipeCommon diameter:Φ22,Φ20,Φ18,Φ16 ... of usersQuality certification : UL TUVquality gurantee Economical Liquid heating pipe for water heater