... .5,Insulation:foaming polyurethane thickness:50mm or 55mm6,Optional electric heater:220v-240v 1500w/3000w7,frame material :202 stainless ... The electromagnetism or ball valve can perform the water supply automatically,the water in the tank is not sufficient ,the ... furnished in good style .5,Tank is equipped with electric water heater setting,automatic temperature controller.6,With increased anode ...