Solar water heater has just been used for two years, the solar vacuum tube into the silver part has reached 5 cm so long, what is the reason, normal? Do you need repair?
Is the pipe blown up. See if you can see the water is blown up. No matter what the bombing did not change as long as the color change.
That's when it's out there, not because of time. Need to remind you that the abnormal tube is generally very black, or the heat sink off the transparent, these two conditions can be judged as the tube has been bad, you need to change ~!
You say the silver part is located at the bottom of the vacuum tube,
Hello, I am a 5 years of experience in the installation of specific technicians
