... ' warranty for the systems. The split pressurized solar water heating system is made up of solar collector, pressurizedwater tank, pump working station, expansion ... close to the collectors.Specification1)Water Tank(100L-500L): porcelain enamel, with 2 copper coils for heat exchange, depending on the customers ... -in electrical back up: 1.5kw/2.5kw,with thermostat Solar Water Heater