The structure of drain type solar energy is different from that of ordinary solar energy. The ordinary solar water inlet and outlet are at the bottom of the water tank, and the water flows downward by its own gravity; The solar type water inlet and outlet are at the top of the water tank, and the water is sucked in by the siphon principle for use. Discharge type solar power is indeed "the solar water inlet and outlet are connected to a tee and a ball valve is installed", but the prerequisite is that the water inlet and outlet are at the top of the water tank. Connect a pipe from the tee to the bathroom, then connect a valve. Note that the pipe must have a slope to prevent water from entering. If you use ordinary solar energy, you can go to a solar energy store to buy an electric drain valve and press it, which is also very useful.
It's more awkwardant. You need to empty the water into the water tank, then remove the heating vacuum tubes one by one, then empty the water into the tubes to discharge the water from the solar energy. Hold the vacuum tube with your hands and push it hard. Once the bottom is out of the groove, lift it slightly then pull it down. When installing, apply soap foam or detergent to the tube mouth, but pay. Particular attention. Wait overnight before filling the water, the vacuum tube can only work when it is cold, otherwise it will burst.