... 4.Unpressurized,more safe DEAKON unpressrized vacuum tube solar wate heaters Products features: 1, Modular design, ... efficient and energy saving.4, Multifunction: bathing, washing ,domestic heating etc..5, The max. hot water temp. can ... d, Glass tube: new trivalent element heat tube, borosilicate glass 3.3.e, Water capacity: 100L,150L, ... 6581800363502.90162 Vacuum tube stainless steel solar water heater