Solar water heater features: Non-pressure solar water heater relies on the natural circulation of water between the collector and the tank. As water in the vacuum tubes is heated it rises naturally into the tank, while cooler water in the tank flows down to the bottom of the vacuum tubes, causing circulation throughout the system The angel of bracket is decided according to your latitude. Its performance is stable, reliable and easy installation. It adopts scientific structure to reach the best performance. The system can be perfectly integrated with architecture. The system can endure the maximum pressure up to 0.2 Mpa.