Before we move on, note that “the first pump” to come on is not necessarily Pump #1.  The Control Panel circuitry alternates Pump #1 and Pump #2 to be “the first pump”.  If this was not done, the “second pump” would hardly ever come on.  This would mean the “first pump” would wear out long before the second pump even turned on.  This alternating circuitry allows both pumps to wear evenly, providing a long life to both pumps.

 

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OK, now on to the operation—we’re almost done with the Wetwell section.  If you understand it to here, you’ve got it made!

 

Take a look at this photo.  See the two blue valves?  This photo was taken during construction, before the area around the wetwell was covered up.  The two blue valves are on the outlet pipes coming from each of the two pumps in the wetwell.

Emergency Operation Standpipe (explained later)

Valve to open Emergency Operation Standpipe

Black lines indicate interconnected piping under dirt.

Piping to Force Main

This Valve Box and Cover next to the

Wetwell can be opened to get to the blue outlet valves.  The valves MUST be OPEN for the pumps to be able to pump sewage from the Wetwell to the Force Main.

This explanation ends the Wetwell section.  Hopefully, you will now understand how the sewage enters the Wetwell, where the pumps and valves are, how the float switches send a signal to the Control Panel to turn the pumps on and off, and how the sewage is pumped to the Force Main and on to the Hotel.

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