The thick water valve is always open during reverse osmosis operation, so that when the reverse osmosis unit stops running, a "siphoning" phenomenon occurs if the highest point of the discharge pipe is below the highest point of the pressure vessel.
The water in the pressure vessel will flow out of the reverse osmosis unit through the concentrated water discharge pipe due to self-weight, and air is mixed in the pressure vessel.
Firstly, it is easy to cause the phenomenon of water hammer.
Secondly, the oxygen in the air will have more or less oxidation effect on the reverse osmosis membrane element during shutdown operation, which will affect the service life of the membrane element.
