... Solar water heater 2. SRCC, CSA, Solar Keymark, AS/NZS 2712 certified 3. Continuously improved design solar, solar water heater, solar collector, evacuated tube & heat pipe, solar ... / 80" Apricus AP range of evacuated tube solar collectors are suitable for both residential and commercial applications ... 3: A pump circulates water or heat transfer fluid through the header pipe, carrying heat back to ...