Quick Answer:
If your meter started acting differently after plumbing work, first shut every fixture and appliance that uses water and watch the meter for drift. Small changes often come from trapped air, a shifted valve, or a partial seal; persistent movement usually means a leak or an installation issue that needs fixing.
Why This Happens
Plumbing work disturbs pipes, valves, and seals. When lines are opened, air can get trapped and cause the meter to tick or behave irregularly. A valve that was nudged or not fully tightened can let a tiny flow continue. Work on nearby drains or the service line can also change pressure and flow patterns, which shows up at the meter.
Common causes include:
- Air pockets moving through the meter after lines were drained or refilled.
- A loose or partially closed valve that allows a slow flow.
- A disturbed or damaged fitting that develops a small leak.
- Pressure changes after repairs on the supply line that alter meter behavior.
Step-by-Step What to Do
1. Stop all water use
Shut every faucet, turn off appliances that use water (dishwasher, washing machine), and close outdoor taps. This gives you a stable baseline to see if the meter moves with no demand on the system.
2. Shut fixtures and watch the meter
With everything off, watch the meter for at least 5–10 minutes. This is the crucial check: shut all fixtures and watch meter drift behavior. If the meter needle or digital reading moves steadily, you likely have a leak or an open valve.
3. Check visible fittings and valves
Walk through areas where work was done and look for dripping, wet spots, or moisture under exposed pipes. Check the main shutoff and any supply valves to appliances; make sure they are fully seated but don’t force them.
4. Isolate sections if possible
If you can, close branch isolation valves (for example, under sinks or to the water heater) one at a time and watch the meter. If the meter stops moving after closing a valve, you’ve narrowed the problem to that section.
5. Repressurize slowly and observe
If air in the system seems likely, open a faucet on the highest floor briefly to let air escape, then slowly reopen the main valve. Watch the meter while the system re-fills to see if the odd behavior stops once air is out.
6. Note timing and patterns
Write down what you observe—steady drift, occasional ticks, or movement only when certain fixtures are used. This helps a professional diagnose the issue if you need help.
What Not to Do
- Don’t ignore meter anomalies. Small signs often become bigger problems if left alone.
- Don’t force stuck valves or fittings; you could break them and create a larger leak.
- Don’t use open flames or heat to thaw pipes; that risks damage and fire.
When to Call a Professional
Call a licensed plumber if any of the following apply:
- The meter continues to register flow with all fixtures off.
- You locate moisture but can’t stop it or identify the exact source.
- There was recent work on the service line or main and you see pressure swings or constant movement at the meter.
If the work was on drains and you now hear bubbles or strange noises elsewhere, see the tip about Whole house gurgles after drain work. For problems that started after city or service-line repairs, check guidance similar to Pressure unstable after city line repair.
Safety Notes
- Turn off the main water supply before working on exposed pipes and fittings.
- Use basic protective gear—gloves and eye protection—when inspecting disturbed areas.
- If a leak is large or causing electrical risk, shut off the main and contact a professional immediately.
Common Homeowner Questions
- Why does the meter tick after I had a plumber work on a line?
Air and small pressure changes often pass through the meter after work and cause ticks; watch for persistent movement to rule out leaks. - How long should I watch the meter before calling someone?
Watch for 5–10 minutes with everything off; if it moves steadily during that time, call a plumber. - Can I fix a slow leak myself?
Minor drips from an exposed valve can sometimes be tightened, but if you’re unsure or the leak is hidden, get a professional to avoid making it worse.