Many private well homes in Missouri have no water meter at all, because the household draws from its own well and pays no utility for the water itself. If your system does have a meter, perhaps one installed on the line after the pressure tank or near the water heater, it can be a simple way to check whether water is moving through the house when nobody is using it. This guide explains a basic meter check you can do yourself with a pen and a notebook.
What the Meter Tells You
A meter records the total volume of water that has passed through it since it was installed. The dial, digital register, or sweep hand moves only when water flows. Read the register at a set time, then read it again later. If the reading changed, water went somewhere. Your job is to find out whether that flow matched normal use.
A meter does not tell you where water is leaking, what kind of leak it is, or whether the water is safe to drink. It is a flow indicator only. Treat it as a first screen, not a diagnosis.
Set Up a Quiet-Period Check
Pick a time when the household is asleep or away, such as overnight or during a workday when no one is home. Make sure no one runs a washer, dishwasher, shower, sprinkler, or hose during the check. If you can do so safely, turn off the ice maker feed, since it can refill on its own.
- Write down the meter reading, the date, and the time.
- Wait several hours with no water use.
- Read the meter again and write that down.
- Note whether the sweep hand or leak indicator moved during the wait.
Reading the Results
If the meter did not move, the house had no measurable flow during the check, which is what you want to see. If it moved, do not panic. Some causes are normal: a toilet tank refilling after someone flushed shortly before the check, a water softener regenerating on a timer, an irrigation zone running on a schedule, or a water heater refilling after a hot water draw. Check those first.
If the meter kept moving with every fixture off and no scheduled equipment running, you have continuing flow. Common homeowner causes to look at include a running or partly open toilet fill valve, a dripping outdoor spigot, a leaking hose bib, a leak at a supply line under a sink, or a break in a buried line between the house and the well. Check the easy items first, then move to the yard.
Simple Checks Inside the House
- Look inside toilet tanks for a fill valve that keeps running or a flapper that does not seal. A few drops of food coloring in the tank can show slow leaks into the bowl without flushing.
- Look under sinks and around water heater connections for damp spots, staining, or mineral crust.
- Check the water softener and any other treatment equipment for scheduled regeneration, and confirm whether its drain is running.
- Confirm that no faucet is dripping, including fixtures that are seldom used.
Simple Checks Outside
Walk the yard along the line from the house toward the well. Look for soft or unusually green ground, areas that stay wet after dry weather, or sunken spots that could mean a line is leaking. Check outdoor spigots and hose bibs for drips. Do not dig to find a leak without knowing where the line runs. If you do not have a map of the water line, a licensed well contractor or plumber can help locate it. This guide does not cover well repairs.
Keep a Simple Record
Write each reading in a log with the date, the time, and whether anyone was using water. Over several months, the log shows whether flow is steady, rising, or appearing only at certain times. Changes that follow heavy rain, a freeze, or a power outage are worth noting too, since they can point to a different cause.
When to Stop Guessing
If the meter keeps moving with everything off and you cannot find the source inside or outside the house, stop the search and call a qualified person. Continuous flow can strain a pump and pressure system, so do not ignore it for long periods. Tell whoever you call what your readings showed and when they were taken. Missouri homeowners whose well pump cycles often, or whose system loses pressure, should also check the pump and pressure tank rather than assume the meter alone explains the problem.