How do you calculate depth of sump?

To calculate the depth of a sump, measure the vertical distance from the bottom of the sump to the point where the water level is intended to be maintained. You can also factor in any required freeboard, which is the space above the water level to prevent overflow. Additionally, consider the sump's total volume and the flow rate of water entering it to determine if the depth is sufficient for your needs. Using these measurements, you can ensure the sump is adequately sized for its intended purpose.