How to distinguish the vacuum tube of solar water heater?
The quality of the vacuum tube of the basic brand manufacturers will just off the assembly lines, some flaws are normal,Look at the surface and the inside have no scratches
Should be replaced in a timely manner to better, hold the vacuum tube back and forth rotation, so that the water tank of the sealing ring and the vacuum tube is loose, then slowly turn the vacuum tube into the water tank, push to the bottom of the vacuum tube is lifted from the base bracket, then slowly pulled out, and then the new vacuum tube installed in the same way you can.
If the clean solar water heater temperature is not high, or the insulation performance becomes poor, you should check whether the tube to the top of the building there is a problem, the specific method is: first, look at the color, the loss of vacuum thermal insulation tube color white, touch is warm, the vacuum tube collector and heat insulation function has been lost,
