... ,SRCC,SABS.SGS 2,7 years warranty 3,Delievery 7-10days 4,High Quanlity&Reasonable Price non-pressurized compact solar water heaterCertification:Have passed ... radiation rate:≤6% Temperature when ecposed to sun without water:250 degree ,2.5 hours to boiling if using tube.Resist 25mm ... /58-243.402420032/76SP470-1800/58-304.323025026/63 non-pressurized solar water heater..