... grade stainless steel inner tank 3. High density import polyurethane. Separated Storage Water Tank---Pressurized TankCE,SRCC,ISO, ... .0mm Copper coil numberNone, Singel, Double in optionalCOMPONENTSEach tank equip with a Electric heater, a Magnesium bar, ... valve and Electric control boxModel No.Water CapacityInner tank (SUS304)Outer tank ( Painted steel)InsulationSingle Copper coilDouble Copper ...