... pressure Vacuum Tube Solar Water Heater ISO9001,ISO14001,RoHS,CCC,CE 10years warranty Factory price Non-pressure Vacuum Tube Solar Water Heater Vacuum tubes ... 150-1800/58-15-HP15Ø58-1.8m15042/89/105JJR-200-1800/58-20-HP20Ø58-1.8m20035/74/86JJR-240 ... -1800/58-24-HP24Ø58-1.8m24031/65/77JJR-300 ... : 27°, 38°, 45° Non-pressure Vacuum Tube Solar Water Heater System