vacuum tube solar water heater 1.15years warranty 2.CE&CCC ISO9001:2000 certification 3.Manufacturer for more than 14years. vacuum tube solar ... water heater1,vacuum tube length:47/1500mm,58/18002,vacuum tubes:15pcs,18pcs,20pcs,24pcs,30pcs3 ... out installation of separation according to fabricating yard. Pressurized vacuum tube solar water heater