Solar vacuum tube water or water is goodPlease specify
Each has advantages and disadvantages, is generally not used in water or poor quality of a cold winter in the north, South to choose water type, water does not work in the original is by vacuum, a long time, the vacuum tube is reduced, the heat collecting effect will be greatly reduced, the water is frozen fried tube the possibility of pipe, but the service life is longer than that without water, especially after 35 years of use, the effect will be significantly more out. Regional comparison, individuals with the love of water
40 degrees below zero will not crack pipe. There are 10 degrees below zero water, no more than 3 days of sunlight, it will freeze the pipe. After the water will withdraw from the market. After all the glass tube is anhydrous.
If you do not clean, the effect is much worse. Anhydrous, cleaning is not discharged, add detergent, water off well. There are 3 major advantages of anti explosion function, leak proof, even if the 1 pipes broken will not leak. Antifreeze
Of course, is a good water. There are 2 to 3 years of water there will be a lot of scale, clean up very troublesome. To remove all the glass tube to clean.
