... 1. Heat pipe solar collector 2. SRCC, CSA, Solar Keymark, AS/NZS 2712 certified 3. Continuously improve design Product Descriptionheat pipe solar collector, solar water heater, solar collector, evacuated tube & heat pipe, solar renewable ... through the header pipe, carrying heat back to thestorage tank. Gradually throughout the day the tank is heated up. Apricus Split Heat Pipe Solar Collector