... efficiency of the solar heater collector. Save much electricity. Main feature:1.Without water tank,improve the useful ... ,new basking way,bask water directly;3.Never mix water,give much hot water, water quality is clean and ... Quality Certification Center. Our solar heater has no tank,and store the hot water by pipes, one kind ... 8L's,if you want 150L,the solar heater will be formed by 10 pipes of 15L' ...