How to Find a Water Leak Underground in Brakpan

If you're working out how to find a water leak underground, start at the water meter, not with a spade. An hour with every tap in the house shut tells you whether water is escaping at all. Finding where it escapes, under a lawn, a driveway or a floor slab, takes locating equipment, and that is where a homeowner's part ends and a plumber's begins.

This guide from The Brakpan Plumbers covers the homeowner's part properly: how to run the meter test so the result means something, what a Brakpan yard shows when a buried pipe is leaking, and when the water you can see is one for the City to deal with. Once the meter has proved a leak, leak detection in Brakpan takes it from there.

How can I tell if I have an underground water leak?

Three things give an underground leak away: the water bill, the meter and the ground. Only one of them proves it.

• The bill jumps although nobody in the house is using more water. That is a reason to look, not proof. A bill can also be high because a reading was estimated or misread.
• The meter keeps moving when every tap, toilet and appliance is off. This is the proof. Water that passes through the meter has to go somewhere, and if nothing in the house is drawing it, it is leaving a pipe.
• The ground shows a patch that stays wet in dry weather, grass that grows greener along a line, or paving that sinks. These point to roughly where, but not always to the exact spot, and some underground leaks never show on the surface at all.

So the order is always the same: prove it at the meter, describe it from the yard, and leave the pinpointing to equipment.

The meter test that proves an underground leak

Your meter is normally in a box at the front of the property, at the boundary or in the verge. Lift the lid and you will see a row of numbers, and on many meters a small star or wheel that spins when even a trickle passes through. You only need to know whether anything moves when it shouldn't.

If the two readings match, the plumbing is holding while nothing is in use, and a high bill calls for a closer look at the readings rather than the pipes. If the second reading is higher, water is being lost somewhere after the meter. That proves a leak, though not yet an underground one.

Splitting the yard from the house

Many houses have a second valve, a stopcock where the pipe enters the building, separate from the one at the meter. If yours has one, close it and repeat the test with the valve at the meter still open.

If the meter keeps turning with the house shut off, the water is being lost between the meter and the house wall: in the buried pipe across the yard, or in a branch off it to a garden tap, an irrigation line or the pool. If the meter stops, the loss is inside the house, from a cistern or tap you missed or a pipe in a wall, a ceiling or under the slab, and the yard is not the place to look.

Not every house has that second stopcock. If yours is missing or too stiff to turn, don't force it: the first test has already told you what matters, which is that there is a leak.

Not in the days after an outage

Run the test on a day when the supply has been normal for a while. Brakpan's water goes off often enough for this to matter. In September 2020 a breakdown at the Rand Water booster pump station that supplies the reservoirs at Sallies left Withok Estates, Vulcania, Maryvlei, Brenthurst and Sallies on intermittent supply for about a week, until the 15th. On 29 May 2026, Rand Water's maintenance cut supply to most of Brakpan, from Brakpan North and Dalview to Leachville, Minnebron and Sunair Park, from 07:00 to 19:00, and the Brakpan Herald's report warned that pressure and supply could take up to two weeks to return to normal, especially in high-lying areas.

While the pipes refill, the meter moves for reasons that have nothing to do with a leak. The City of Ekurhuleni has also warned that its mechanical meters can be turned by air as well as by water, which is why it asks residents to keep their taps closed while the supply is off. A reading taken while air is still leaving the pipes can mislead you.

Signs of an underground leak in a Brakpan yard

Once the meter has shown a loss and the split test has pointed outside, the yard can help narrow it down. On a dry day, walk the line between the meter and the house, and along any branch to a garden tap, and look for:

• A patch that stays wet or soft underfoot when the rest of the garden is dry.
• A strip of grass greener than the rest, running in a line, often the line of the pipe.
• Paving that sinks, lifts or stays dark at the joints, or sand washing out from between the blocks.
• Water standing in the meter box on a dry day. Read the next section before calling anyone about this one.
• A hiss or a trickle at a tap or at the meter when everything is shut.
• A warm patch on a tiled floor. That often means a hot-water pipe leaking under the slab, which belongs on the house side of the split test. Switch the geyser off at the board so you are not paying to heat water that is being lost.
• Pressure that has dropped at every tap while the neighbours' is fine. Weak evidence on its own, since Brakpan's pressure also drops after supply interruptions, but it adds up with a moving meter.

Damp that only appears after storms is a different problem. Water lying against a wall after rain soaks into the brickwork and, from inside the room, looks exactly like a leak. The pencil-line test on our leak detection page tells the two apart, and if the meter stood still in your test, rain is the likelier cause.

One caution covers every sign on this list. Water from a buried pipe follows the easiest path, which can be along the trench the pipe was laid in, so a wet patch may appear some distance from the leak itself. The sign tells you there is water. It doesn't mark the spot.

Water in the road, the verge or the meter box

If water is coming up in the road, the pavement or the verge outside your boundary, you don't need the meter test: that is a leak for the City's teams. The same goes for water bubbling up around the meter itself. Report it to the City of Ekurhuleni's call centre on 0860 543 000, by email to call.centre@ekurhuleni.gov.za or through the My CoE App, where water leaks and faulty water meters are both on the list of faults it takes. Give your address and the nearest cross road, and keep the reference number for follow-ups.

Some Brakpan roads call for more care than a leak usually does. Gauteng Tourism's report on illegal mining in Brakpan describes miners tunnelling beneath Snake Road, with a large sinkhole on the shoulder as drivers approach the N12, damage on Oval Road near Sherwood Gardens, and Golden Drive as a known hotspot. It warns that underground mining can damage water pipes and stormwater drains, and recalls the collapse that closed Main Reef Road. Where water is escaping under a road like that, keep people and cars away from the spot. If the ground has sunk or a hole has opened, the City lists sinkholes among the emergencies for its emergency line: 10177, or 011 458 0911.

How do I find out where my water is leaking from?

Start above ground, because plenty of leaks that keep a meter turning have nothing to do with buried pipes. Work through these before deciding the problem is underground:

• Toilets. Put a few drops of food colouring in the cistern and don't flush for half an hour. Colour in the pan means the cistern is leaking through, quietly, all day.
• Taps, inside and out, including the one the hose lives on.
• The geyser's overflow pipe outside. A steady drip there is water through the meter too, and it comes from the geyser, not the ground.
• Irrigation valves and drippers, which can leak with the timer off.
• The pool's top-up valve, if it has one, which can run unnoticed.

If all of those are dry and the split test points outside, the leak is in the buried pipe or one of its branches. That is as far as a homeowner can usefully take it.

The tempting next step is digging where you think the pipe runs, and that is how a small leak becomes an expensive one. Pipes don't always run in the straight line you would draw from the meter to the house: some go round foundations or under the driveway, and later branches join them where nobody remembers. The same ground can hold the drain and the cable to a gate motor or garden lights. Each wrong hole means paving lifted and relaid, or lawn dug up, without getting closer.

Why finding a water leak underground takes equipment

Pinpointing a buried leak means reading signals through the ground that you can't see or hear from the surface. Leak detection equipment does it in a few ways, and which one a search needs depends on the pipe, how deep it lies and what covers it.

• Listening. Water escaping from a pipe under mains pressure makes a noise. A ground microphone and amplifier pick it up through soil, paving or concrete, and the sound is loudest above the leak.
• Tracing the route. A locator follows where the pipe actually runs, so the search follows the real line instead of a guess.
• Tracer gas. On a quiet leak, the drained pipe can be filled with a hydrogen-and-nitrogen gas mix, and a detector picks up the gas where it rises through the ground.
• Heat. A hot-water pipe leaking under a slab shows as a warm track on a thermal camera before it shows as damp.
• Isolating sections. Closing valves and branches in turn, and watching the meter, narrows the loss to one run of pipe.

The point of all of it is one opening, in the right place, instead of a trench across the garden. On a leak detection call from us the order is fixed. The meter test is done together. Sections are closed one at a time until the loss is narrowed to one run of pipe. The place and size of any opening are agreed and priced in writing before it is made. After the repair you watch the meter with every tap closed, and it should not move.

What are the most common water leaks?

Inside the house, the usual suspects are the ones on the checklist above: a cistern leaking through to the pan, a dripping tap, a geyser overflow that never stops. They waste water just as surely as a buried pipe, but you can see them.

Underground, leaks tend to turn up in a few places:

• the service pipe from the meter to the house, usually the longest buried run on the property;
• joints and fittings, where the pipe changes direction, rises to a tap or meets a branch;
• branches to garden taps, irrigation and pool lines, which are often added after the house was built;
• pipes under the floor slab, where a hot-water leak shows as warmth first;
• pipes crushed under a driveway, nicked by digging or pushed by tree roots.

A leak in any of them keeps going, day and night, under the full pressure of the supply. It won't seal itself, and water running under paving or a slab can wash out the ground beneath it, so a leak found early stays a small repair.

Before you ask for a leak search

If your meter moved with everything shut, write down both readings and the time between them, and whether the split test pointed to the yard or the house. Add any signs from the yard, and where they are. Then send it all on the call-out coupon at the foot of this page. A plumber phones you back, says the visit charge before anyone drives out, and the search starts from what your meter has already shown.