... used. Specifications : Solar Keymark,SGS,CCC,CE,ISO, Sample available,export right possessed , OEM Solar vacuum tube:a) Size: 47 x ... in case several shattered vacuum tubes during transitthe solar water heater will work more perect if work together with the ... tank for automatic water loading or Automatic valve b). Electrical heater: c). Controller DESCRIPTION 1.stable and reliable performance and well ...