1. If the pump tank is 49 inches x 60 inches x 70 inches with no check valve, calculate the gallons per inch.

2. There are 80 feet of 2-inch Schedule 40 PVC supply pipe with no check valve. If the “off” float is at 62 inches from the surface reference point and the “on” float is 57 inches from the reference point, what is the volume delivered to the system?

3. If the pump runs for 77 seconds, what is the flow rate?

4. If a cycle counter reads 46,490 today and 45,850 120 days ago, how many cycles did the pump run?

5. Calculate the total flow and the average flow over the 120 days.

6. If the design flow is 300 gallons per day, what does this tell you?

Answers are posted here. 

Here’s a review of Simple Septic Math and our Pointers for Onsite Arithmetic.