How to Calculate Flow Rates and Volume for Water Wells

Building a new house and need to check the water well yield rate. I go over how to calculate the flow rate of the water getting pumped out of the well as well as how to calculate the amount of static water in the well. Calculate flow rate, calculate the volume of the pipe. How many gallons are there in a foot of 4-inch diameter pipe? Flow Rate.
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[@Bobcagon]

🇨🇦Thanks for this in-depth explanation. Probably the most overlooked criterion a rural home buyer encounters. Most people( myself included) rely on the fill the bucket from a tap test to equate gallons per minute. Which of course doesn’t really tell you anything apart from the fact your tap flow can fill a bucket in x number of time. Older properties with drilled wells which have been bought and sold over decades and NO data have been passed on to new owners are common. At least what I find. I’m sure the data would be collected at point of drilling but as with our well there was no documentation passed on from original point and so buyers and sellers rely on experience of history of water use.The old saying”Don’t Worry About the water Until the Well Runs Dry” is the sad truth for many homeowners.

[@ColfaxMath]

No water,no home is what I usually go by. Thank you for the good feedback

[@dysfunctional_vet]

i have watched a lot of videos on this and you are the first person that knew what they were talking about.
i will link you in my description

[@ColfaxMath]

Thank you

[@dougkidd4799]

Great video

[@ColfaxMath]

Thank you

[@tinacobos6517]

well done! Thank you for the info

[@ColfaxMath]

Thank you

[@user-sl1vu3oj3l]

Informative video. So, what is the estimated flow rate from the well? I think there were a couple of more calculations required? This is obviously a fairly high-volume well. How would this method work if you had your 12 gpm pump in a well that could only produce 1 gpm? If I understood correctly, you are assuming the static water level is where the driller first encountered water. In my experience, these values can be vastly different from the actual static water level. Why don't you just measure the static water level before starting the test? In a low-volume well this could make a huge difference.

[@ColfaxMath]

Thank you, yes a lot of potential variability.