1.300L 500L 1000L Split Pressurized Solar Water Heater 2. EN12975, Solar key mark, SRCC, CE, ISO. 3 ... 24/7 300L 500L 1000L Split Pressurized Solar Water Heater Split pressurized Type composite:solar collector+storage tank+controller+working ... /19mm,optionalHeat exchanger materialCopper, stainless steel, optionalFree components:Electric heater, Magnesium rod, T/P valve, Pressure reducing valve Water ...