... Warranty for vacuum tube SPLIT PRESSURIZED SOLAR WATER HEATER FEATURE:1. Solar water heater with SOLAR KEY MARK certificate2. Special high ... Consist of solar collector, water tank/boiler, circulation pump, expansion evessel, controller,flowing meter,pressure gauge3) Capacity: 150L,200L ... ,250L,300L,500L4) Working temperature: 99 celsius degree4) Working pressure: 1.0MPa (10 bar)5) Vacuum tube: D58 , ...