Our solar water heater system takes SUS3042B food grade stainless steel plates to produce inner and outside water tank. The water in the tank is pure and drinkable.
Heat insulation of soalr system adopts polyurethane foam, thickness is 55mm. Silicon rings to connect and seal them.
The collector tubes and supportsing parts are adjustable, power bearing is average, and can assure the vacuum tubes to use long time.