The glass tube above the solar energy shown is a "vacuum collector tube", which is used to collect solar energy.
Solar water heaters collect solar energy through these vacuum collector tubes and convert the solar energy into water thermal energy. Without these collector tubes, the solar water heater would have no way of collecting solar energy and converting it into water. . thermal energy.
If you want to know more relevant information, you can find some technical information related to solar water heaters worth knowing.
bDon’t listen to them. Simply take the pipe clip and go to the dealer where you purchased the solar to get a replacement. The dealer will take the clip and send it back to the factory. If they don't replace it for you, you can purchase one. The most expensive does not exceed 20. Because the ex-factory price of a tubevacuum does not exceed 13 per tube. Of course, the dealer won't sell it to you for 13 yuan. You just need to add a little money. I sell solar energy. The price difference between good tubes and ordinary tubes is 2 yuan each. I hope to adopt it! ! ~