Separated Pressure Solar Water Heater work with working station(including controller, pump and expansion tank). Our Separated Pressure Solar Water Heater is suitable for many different architectural styles with a variety of installation locations. The collector is separated from water storage tank, collector can be installed on roof or balcony. And the water tank position is unrestricted, it can be placed lower than collector, you even can place it inside house. The separated pressure solar water heater is suitable for some families who don't have enough roof area to install solar water heater.