A water leak does not always announce itself. In Wentzville homes, a slow leak can run for weeks under a slab, behind a wall, or at a toilet tank that looks fine from the outside. A meter test is a quick way to find out whether water is moving through your pipes when nothing in the house should be using it. It does not tell you where the leak is, but it tells you whether you have one and whether it is worth looking further.
What You Need
- A flashlight
- Your water bill or account page, so you can compare readings
- A pencil and a notebook or phone note
- A few drops of food coloring, if you want to check the toilets
Find Your Meter
Most homes in Wentzville have the water meter near the street, in a meter box or pit at the front property line, or inside a basement or crawl space near where the water line enters the house. Your city utility or your water provider can tell you where the meter sits on your property if you cannot find it. Lift the lid carefully and keep the flashlight pointed at the meter face.
Look for a small dial, a triangle, or a sweep hand. On many meters this is a leak indicator that turns when any water moves through the line, even a trickle. Learn what it does while the house is quiet, then use it as your first signal.
Run the Meter Test
- Turn off every faucet, shower, and outdoor hose in the house. Check that no dishwasher or washing machine is running.
- Shut off any irrigation or sprinkler zones you control, and make sure no one is using water for a bath or laundry.
- Write down the exact reading on the meter register, including any leading digits you usually skip on your bill.
- Wait a set period with no water use. Use a clock and note the time.
- Read the meter again. Also check whether the leak indicator is moving.
If the reading has not changed and the indicator stays still, the test is clear for that period. If the reading has increased or the indicator keeps turning, water is leaving the system somewhere after the meter and before any shutoff you control.
Narrow the Source
Once the meter test shows movement, the next step is to find out which part of the house is responsible. Work through the most common sources first.
- Toilets: Add a few drops of food coloring to each tank and wait without flushing. If color shows up in the bowl within a short time, the flapper or fill valve is passing water.
- Faucets and hose bibs: Look for drips at the spout, handle, and base. Check that outdoor hose connections are fully closed and that no hose is left attached.
- Irrigation: Check valves, zone heads, and any underground lines that may have shifted or cracked.
- Water heater and supply lines: Look for damp spots on fittings, flexible connectors, and the base of the tank.
- Under sinks and behind appliances: Check supply lines, shutoff valves, and the back of refrigerators and ice makers.
Shut off individual branches or fixtures at their local valves while repeating the meter test. When the indicator stops moving after a particular shutoff, you have narrowed the problem to that branch.
Check Your Bill for a Pattern
Compare your current reading with past bills. A sudden change in use that does not match your household routine is worth noting, even if you did not see any obvious leak. Dates of heavy use, such as summer watering or guests, can explain some increases, so write those down too.
When to Call for Help
If the meter keeps moving with everything off and you cannot find the source at fixtures you can reach, a licensed plumber can locate the leak with equipment and tell you the options. Ask for a written description of what was found before any work begins. If the leak appears to be on the service line between the meter and the house, contact your water provider as well, since they can advise on who is responsible for that section.
Repeat the meter test after any repair. A clean reading after a repair tells you more than a visual check does, and a log of dates and readings will help you spot a return of the problem early.