Vacuum Tube Solar Water Heater, for school, hotel, swimming pool Vacuum Tube Solar Water HeaterSolar center heating project for school, hotel, swimming pool Many solar thermal collectors can be ... -2102.6016702020160512369170XSL50-58/1800Ø 58x1800*50Pc280-3003.912420202023551234096 Vacuum Tube Solar Water Heater