How to Check Gallons per Minute in a Water Well

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Calculating the gallons per minute (GPM) of a faucet or water pipe is a relatively simple calculation. The process requires turning on the faucet and filling a simple bucket while timing the process. All water wells have access points on the pumps that allow you to connect a hose for various maintenance purposes. Calculating the GPM of a water well follows the same process as any faucet using the maintenance faucet as the access point.

Things You'll Need

  • 5-gallon bucket
  • Stopwatch
  • Position the 5-gallon bucket beneath the faucet. Buckets with marks on the side indicating the volume are available from most hardware stores.

  • Turn the water on at the same time as you activate the stopwatch. Stop the watch when the water level reaches the 5-gallon mark.

  • Multiply the minutes by 60 and add to the seconds portion of the time measurement to determine the total number of seconds that passed while filling the bucket.

  • Divide the total seconds by 5 and then again by 60 to arrive at the GPM calculation.

Tips & Warnings

  • If you are unable to locate a 5-gallon bucket with marks on it to indicate the volume, use a 5-gallon, plastic gas can which always comes with a "Full" mark on the side. You can use any bucket or container desired as long as the container has accurate marks indicating the total volume, no matter what the volume is. Divide the total seconds by the total volume of the container and then divide by 60.

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References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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