1. What is Wet Well Size Calculation?

The wet well size calculation determines the required volume of a wet well (pump station sump) based on pump cycle time and pump rate. This ensures adequate storage capacity between pump cycles.

2. How Does the Calculator Work?

The calculator uses the wet well size formula:

Where:

• \( V \) — Wet well volume (ft³)
• \( t \) — Cycle time (min)
• \( Q \) — Pump rate (gpm)

Explanation: The formula calculates the required wet well volume by multiplying the cycle time and pump rate, then dividing by 4 to provide adequate storage capacity.

3. Importance of Wet Well Size Calculation

Details: Proper wet well sizing is crucial for efficient pump operation, preventing short cycling, reducing wear on pumps, and ensuring adequate storage during peak flow conditions.

4. Using the Calculator

Tips: Enter cycle time in minutes and pump rate in gallons per minute (gpm). All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 4 in the formula?
A: The division by 4 accounts for the operating cycle and provides sufficient storage volume between pump activations.

Q2: What is a typical cycle time for pumps?
A: Typical cycle times range from 5-30 minutes depending on the application and pump size.

Q3: How does pump rate affect wet well size?
A: Higher pump rates require larger wet well volumes to maintain proper cycle times and prevent frequent pump cycling.

Q4: Are there other factors to consider in wet well design?
A: Yes, including inflow variations, pump efficiency, safety factors, and future capacity needs should also be considered.

Q5: Can this formula be used for all types of pumps?
A: This formula is generally applicable for most centrifugal pump applications, but specific applications may require adjustments.