... .Good quality with 10 years warranty , 3.High efficien solar water heater:1. Outer board: Aluminum-alloy, thickness 2.0mm 2. ... once heat is absorbed, it is transferred to the water in the manifold, and not lost to the outside ... pipe has its special principle and function, and no water in the pipe. If one of the pipe is broken ... -58/1200-30P3.45 (m2)1230*1385*250.42m3 2012 new style solor water heater