... welcomed! 3,17 years of manufacture 4,5 years warranty The detailed description of water heater: 1) Test Pressure 9 ... the tap water, and the outlet hole produces pressure hot water directly 5)Efficiency: The advantage of solar tubes ... heat is absorbed, it is transferred to the water in the manifold, and not lost to the ... principle and function, and no water in the pipe. If one of the pipe is broken, the ...