... performance. CE EN12975 KEYMARK Split Pressurized Solar Water Heater Premium Solar Collector Specification: Three-target Vacuum ... (110) EN12975 KEYMARK Split Pressurized Solar Water Heater Water Tank Specification Water Tank Performance and Specification ... ,optionalHeat exchanger materialCopper, stainless steel, optionalFree components:Electric heater, Magnesium rod, T/P valve, Pressure reducing valve ...