vacuum tube solar collector 1Easy install and operation 2Well wind, snow and hail resistan ... pressurized vacuum tube solar collector Features:1. This system consists of solar vacuum tube, heat pipe, water tank, stand, P/T valve. 2. It is very high efficiency ... . Quality Certificate: ISO: 9001:2000, CE.5. Brand: SUNRISE /OEM.6. Warranty: 5 years for complete system, 15 years for solar vacuum tube.7 ...