... side 2.Pre-heated pressure system need pressure Pre-heated pressure system, Pre-heated, solar hot water1. Pre-heated pressure system ... people can use the water very conveniently. Pre-heated pressure system features 1. Copper heat pipes for rapid ... 20L, 30L, 60L, 100L, 150L etc.Pre-heated pressure system, Pre-heated, solar hot waterBrand nameSUNTASKProduct nameThermosyphon Unpressurized Solar Water ...