Hello,

I have a situation with two tanks in my model (WaterCAD, standalone).

The current set up is thus:

The model - The larger of the two tanks is at a higher elevation, as are the piping and junctions for the larger tank. The smaller of the two tanks is at a lower elevation, as are the piping and junctions for the smaller tank.

Here are the current operating parameters of the two tanks:

T-1

Elevation (ft) 553.46

Elevation (Base) (ft) 553.46

Level (Minimum) (ft) 17

Level (Initial) (ft) 18.5

Level (Maximum) (ft) 19.5

T-2

Elevation (ft) 550.52

Elevation (Base) (ft) 550.52

Level (Minimum) (ft) 17

Level (Initial) (ft) 18.5

Level (Maximum) (ft) 19.5

The issue - The larger of the two tanks is flowing into the smaller tank according to the model (makes sense if the system is gravity fed). I need the two tanks to run in parallel because that is the current operation.

The question - If the system is completely gravity fed, what valve or valves do I need to use to prevent the larger tank from flowing into the smaller tank, and have both run in parallel operation? I need both tanks to contribute to the system. I assumed a check valve would work to prevent the larger tank from flowing into the smaller tank, but I have no experience using them, so I am hesitant to.

Thank you for reading all of this,

Clint Taylor, EIT