How to use these worksheets
The meter guide explains the method; this page gives you somewhere to write it down. Use the overnight test when you suspect a slow leak, the isolation worksheet when the meter is definitely moving, and the monthly log as a routine habit. Fullerton bills from its own city meter readings, so your own numbers can also help if you need to talk to the city about a bill.
Record the full number on the meter's register, including any digits after the decimal or the sweep hand position, so small changes are visible.
Worksheet 1: overnight test
| Step | Time | Reading |
|---|---|---|
| All fixtures, appliances and irrigation off; reading at bedtime | ||
| Reading the next morning before any water use | ||
| Difference (morning minus bedtime) |
Worksheet 2: valve-by-valve isolation
| Valve closed | Indicator moving? (Y/N) | What it suggests |
|---|---|---|
| Nothing closed, all fixtures off | Moving means a leak somewhere | |
| Irrigation supply closed | Stops: irrigation leak | |
| House main closed | Still moving: service line | |
| Water heater cold inlet closed (main open) | Stops: hot side leak | |
| Toilet angle stops closed | Stops: toilet leak |
Worksheet 3: monthly habit
- Pick a day.Use the same day each month, such as the first Saturday.
- Read at a quiet time.Early morning before anyone uses water works well.
- Watch for 10 minutes.Note whether the low-flow indicator moves with everything off.
- Compare with your bill.When the bill arrives, check that the usage matches your expectations.
Monthly log
| Month | Reading | Indicator still? | Notes |
|---|---|---|---|
| January | |||
| February | |||
| March | |||
| April | |||
| May | |||
| June | |||
| July | |||
| August | |||
| September | |||
| October | |||
| November | |||
| December |
Common questions
What units does the meter show?
Meters register volume in units set by the utility. Write down the number as shown and compare like with like; your bill explains the units used.
Can I use photos instead of writing readings down?
Yes. Dated photos are good records. Keep them in one album so they are easy to share.
The indicator moved once then stopped. Is that a leak?
A single short movement may be a toilet or appliance refilling. Repeat the test and check toilets with the dye test.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.