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The spring is typically located around a central shaft that is attached to the closing disk. The entire assembly is securely enclosed in a machined brass housing that contains the workings of the check valve. The check valve is generally located above the submersible pump unit by a few inches. This ensures that the long column of water remains in the well pipe. This increases the efficiency of the pump by not having to refill the length of the pipe every time the system calls for water.
When we first turn on the well pump it fills the bottom bladder of the well tank with water. As the tank fills up the top bladder filled with air is contracted and as a result the air pressure builds. On the outside of a tank there is a pressure switch which measures the amount of pressure in the well tank. When the well pump has filled the tank to the point where the top bladder has contracted to 60 pounds of pressure the pressure switch cuts off electric to the pump and water stops flowing. Letâs now say someone in the home goes to take a shower.