Measuring Water Loss

To verify the reading from your water bill you only need to check the first 4 dials on the register (or the first 5 dials for larger meters), and the reading should be equal to or greater than the reading on the bill. Remember, for City customers we bill in Ccf units and one Ccf equals 748 gallons. If the reading on the meter when you check it is the same as it is on the most recent water bill it does not necessarily mean that there was no water consumption since we took the reading; some water may have gone through the meter but not enough to advance the last dial used for the reading.

In order to determine if you have leaks you must check the meter when you are certain that there is no water being used at the time (including evaporative coolers). If there is any movement of the sweep hand or the flow indicator, then there is likely a leak on the property. Bear in mind that some types of leaks may be intermittent (i.e. commodes with faulty flush valves) and may not be detectable during a very short period of time.

When you monitor a meter to check for the rate of water flow, mark the position of the cubic foot sweep hand on the register and time the movement for one minute. Record the distance the sweep hand moved, in terms of cubic feet or gallons per minute. If necessary, refer to the Conversion Chart For Cubic Foot Meters (below) to determine the rate of flow in gallons or the potential water loss in hours, days or a month.

Conversion Chart for Cubic Foot Meters
Usage in Cubic Feet Per Minute Approx. Gallons Per Minute Approx. Gallons Per Hour Approx. Gallons Per Day Approx. Gallons Per Month Approx. Ccf (units) Per Month
1/200 4/100 2.25 54 1,620 2
1/100 7/100 4.5 108 3,240 4
2/100 3/20 9 216 6,480 9
3/100 1/4 13.5 324 9,720 12
4/100 3/10 18 432 12,960 18
5/100 0.375 22.5 540 16,200 22
1/10 0.75 45 1,080 32,400 43
2/10 1.5 90 2,160 64,800 86
3/10 2.25 135 3,240 97,200 130
4/10 3 180 4,320 129,600 173
5/10 3.75 225 5,400 162,000 216
6/10 4.5 270 6,480 194,400 259
7/10 5.25 315 7,560 226,800 302
8/10 6 360 8,640 259,200 346
9/10 6.75 405 9,720 291,600 389
1 Cubic Foot 7.5 450 10,800 324,000 432
 
Water Loss From Leaks
 
Supply Line Leaks at 60 lbs. of Pressure
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