... water tank, crystal inner tank, no incrustation fur Water tank specifications and technical details:1. Tank capacity: single copper coil: 100LSingle/double/none copper coil: 150L, 200L ... , 250L, 300L, 400L and 500L2. Inner tank diameter: 410mm (100-200L) 500mm ... water inlet and outlet: G3/4" (100-300L); G1" (400-500L)11. Electric heaters: 2KW (100-200L); 3KW (250-500L) High quality water tank ...