Water Meter Spinning but No Leak? How to Check and What It Means
Meter dial moving with every tap off? How to test a water meter for a leak, what a slow or fast spin means, and the hidden causes that are not a burst pipe.
If your water meter keeps moving when every tap and appliance is off, water is going somewhere, even if you cannot see a leak. A slow creep is usually a running toilet, a dripping tap or a leaking appliance valve. A steady fast spin points to a leak on the supply pipe or a faulty fitting. Test it properly: switch everything off, note the reading, wait an hour, and check again.
Key Takeaways
- A meter that moves with everything off means water is leaving the system.
- Do the test with every tap, appliance and cistern idle, then compare readings an hour apart.
- Toilets and storage tank valves cause more silent loss than burst pipes.
- A fast spin that does not slow down is a reason to isolate the water and call a plumber.
- Write down dates and readings. You may need them for your water company.
A water meter that keeps moving when every tap is off means water is going somewhere. It does not always mean a burst pipe. A slow creep is usually a running toilet, a dripping tap or a tired appliance valve, while a fast, steady spin points to a leak on the supply pipe. The test takes an hour and needs nothing but a torch and a pen.
How to check a water meter for a leak
Find the meter first. In London it is usually under the pavement in a small chamber with a lid, in the front garden, or inside the property near the stopcock. Lift the cover carefully and wipe the glass dry.
Switch everything off
Close all taps, make sure nobody flushes a toilet, and stop the dishwasher, washing machine and any garden hose. Check the ice maker on a fridge freezer too.
Look at the dial
Most meters have a small star or triangle that turns whenever any water passes. If it turns with everything off, water is moving.
Write the reading down
Note the black digits (cubic metres) and the red digits (fractions of a cubic metre). One cubic metre is 1,000 litres.
Wait an hour and read it again
Keep everything off. If the numbers have changed, you have a leak or a fitting that is passing water.
How fast should a water meter spin?
With everything off, it should not spin at all. If the dial is perfectly still for an hour, your system is holding.
| What you see | What it usually means |
|---|---|
| Completely still | No loss at that moment |
| Star turns slowly, a few times a minute | Dripping tap, toilet refilling, appliance valve passing |
| Steady continuous spin | Leak on the pipework, often on the supply pipe |
| Fast spin that never slows | Significant leak, isolate the water and call a plumber |
Water use also matters for the check, so be sure nothing is using water in the background. A flat above or a neighbour will not affect your meter unless you share a supply.
Causes when you cannot see a leak
Most of the meters we are asked about are moving for one of these reasons.
- A toilet that leaks silently. Water slips past a worn flush valve seal into the pan. You hear nothing and see nothing. Drop a little food colouring in the cistern. If the colour reaches the bowl within 20 minutes, the seal is leaking.
- A cold water tank valve that does not close. A tired float valve keeps topping up the tank, with the overflow running outside.
- A dripping tap or mixer. Slow, but it adds up and it will turn the dial.
- A leaking joint under the floor or in a wall. The water soaks away or runs to a drain before you see a stain.
- An outside tap or garden supply. The pipe is exposed to frost and often runs along an outer wall.
- A shared supply or a faulty meter. Less common, but real in converted buildings.
If the bill has jumped and you have found nothing, our guide to a high Thames Water bill with no visible leak covers what to ask the supplier.
Rule things out yourself
You can narrow it down without tools. Close the internal stopcock and look at the meter again. If it stops, the leak is inside the house. If it keeps moving with the stopcock shut, the leak is on the supply pipe between the meter and the stopcock, and that is usually underground or under a floor.
Then open the stopcock and shut isolation valves one at a time on the toilets, washing machine and dishwasher. If the movement stops when one valve closes, that appliance is your leak.
If the meter still moves with the stopcock closed, our leak detection service can trace the pipe without digging blind. For the difference between finding a leak and repairing it, read leak detection vs leak repair.
What it costs
A basic check to find out whether the meter movement is a toilet, a valve or a pipe is usually quick. If it is a buried pipe, you need proper detection. Main water leak detection is a fixed £595. A comprehensive investigation is £660: it checks the whole property for all types of leaks, excluding roofs, and includes tracer gas, moisture mapping and pressure testing. Detection by the hour is £180 per hour with the tracer gas bottle included. No find, no fee. No call-out fee when you book the visit in advance. Need someone now? Emergency call-out is £70 and we guarantee someone is with you within one hour.
- No call-out fee when you book the visit in advance.
- Need someone now? Emergency call-out is £70 and we guarantee someone is with you within one hour.
- No find, no fee on leak detection.
- Main water leak detection: fixed price £595.
- Comprehensive leak detection investigation: £660. It checks the whole property for all types of leaks, excluding roofs, and is all-inclusive: tracer gas, moisture mapping, pressure testing and so on.
- Leak detection by the hour: £180 per hour, tracer gas bottle included.
- Plumbing repair work (not detection) is £95 per hour, and the £60 call-out is waived over 2 hours.
- You get a written price before any repair work starts.
- Gas work is done by Gas Safe registered engineers.
- We answer 24/7 on 020 7870 3200.
When to call a plumber
Call if the dial is still moving with the stopcock shut, if the spin is fast, if you can hear water running in a wall, or if you can see damp on a ceiling or floor. Call 020 7870 3200 any time, or use our contact page. If you are unsure whether the leak is on your pipe or the water company's, this guide to the leak allowance helps you keep the right records.
Meter still moving after you checked everything?
If the dial will not stop and you cannot find the cause, tell us. We will talk through the checks and book a visit if it needs one.
Call 020 7870 3200Or send us the details, see pricing or read about our leak detection service.
Frequently Asked Questions
How fast should a water meter spin when nothing is running?
It should not move at all. With every tap, appliance and cistern idle, a still meter is the normal result. Any steady movement of the dial or the small leak indicator means water is being used or lost somewhere.
Can a water meter spin with no leak?
Yes. The meter reads water passing through it, and that can be a toilet refilling silently, a tank valve topping up, a softener or a neighbour on a shared supply. It is not always a burst pipe, but it is always worth finding.
How long should I leave it when checking a meter for a leak?
One hour is enough to show a leak that is large enough to matter. For a very slow loss, leave it overnight when nobody is using water and compare the first and last readings.
Who pays for water lost through a leak?
If the leak is on pipes you own, the water that went through your meter is normally on your bill. Some water companies offer a leak allowance once it is fixed. Check with yours and keep the repair invoice.
Is a spinning meter always on my side of the property?
No. Most leaks are on your side, but a shared supply, a faulty meter or a leak on the company's pipe can all show up. Take photos of the meter and ask your water company to check it if you find nothing inside.
Sources and further reading
Source links checked 3 November 2026. Scheme rules and manufacturer instructions can change; use the current official guidance for your account or exact appliance.