this solar water heater is a mature product.It has high efficiency and good quality.Can fill or stop filling water automatically.
Features:
1) Thickness of vacuum tube: 1.6mm
2) Inner tank material: SUS304-2B food brand stainless steel
3) Outer tank material: import zinc-plating or color steel
4) polyurethane layer: 60 - 65mm foam, can keep tank warm for two days
5) Frame: galvanized steel,with thickness of 1.5mm
6) the small auxiliary tank can fill cold water into big tank automatically,and it can stop filling automatically too.
