... Flat Plate Solar Collector is some kind of the metal pipe-plate style structure, high heat effect, high hot water ... produced, anti-insolate, water heater in the copper pipe, reliable quality, free maintenance, can stay for 15 years. Slinky ... /m2.3. Material of core: Copper and aluminum unified core, or all copper core, heat pipe diameter: 22mm/25mm. Few welding line, high intension, and ...