Your water bill jumped
Nothing changed in the house but the bill climbed. The most common way an underground leak announces itself.
Hidden leaks under slabs, in walls and underground, traced with acoustic and pressure testing before anyone picks up a chisel. Most jobs found the same day.
Send it through and you'll have a call back — usually inside the hour.
A leak you cannot see is still costing you every single day. Here is how it shows up.
Nothing changed in the house but the bill climbed. The most common way an underground leak announces itself.
Close every tap, then watch the meter for ten minutes. Any movement means water is going somewhere it should not.
Especially one that never quite dries out, or paint and skirting lifting in one spot.
A hot water line leaking under the slab. You can often feel it barefoot before you can see anything.
Persistent damp behind a wall or under a floor, long before it becomes visible.
A gradual loss of pressure with no obvious cause often means supply is escaping before it reaches the tap.
Any of these and it's worth a call. Costs you nothing to have us look.
Call 075 014 4354The expensive way to find a leak is to start breaking things and hope. We do it the other way round: isolate which line is losing water, then pinpoint where along that line, then open up only that spot.
That means acoustic listening equipment, pressure testing on isolated sections, and a meter test to confirm the loss. On a tiled bathroom or a paved driveway, the difference between the two approaches is thousands of rand in reinstatement you never have to pay for.
| Meter test | Confirms there is a genuine loss and gives us a rough sense of how much water is escaping. |
|---|---|
| Pressure isolation | We isolate sections of the installation to narrow the leak to one line before going further. |
| Acoustic detection | Listening equipment picks up the sound of escaping water through slab, soil and paving. |
| Targeted repair | We open up the smallest area that gets the job done, repair, pressure test and reinstate. |
If you suspect a leak, do the meter test tonight: close every tap, note the meter reading, and check it again in the morning before anyone uses water. If it moved, phone us — that reading is the most useful thing you can give us.
No queue, no "someone will be in touch". Here's the clock from the moment you dial.
A plumber picks up. Not a receptionist reading a script, not a callback form.
Before we've even left, you'll be talked through which valve to close. That part is free.
Typically inside the hour anywhere in Sandton, Randburg, Fourways and surrounds.
You see the problem, you hear the price, you say go. What you're quoted is what you pay.
Not an emergency? Same process — we'll book you a slot that suits you, usually the same or next day.
Book a time that suits you
Prime Flow is small on purpose. The person who answers your call is the person who arrives at your gate — so nothing gets lost between the booking and the job.
A fixed number, agreed before anything is opened up. No "while we were in there".
If the same fault comes back inside the guarantee period, we return at no charge.
Geyser installs, COCs and certificates handled properly — the paperwork your insurer asks for.
Floors covered, mess taken with us. You shouldn't be able to tell we were there.
You don't pay for us to come and look. You pay for work you've agreed to.
Managing units? We deal with tenants directly, send one invoice, and keep you posted.
Geysers, drains, leaks and installations — the day-to-day of keeping houses running.
Geyser burst just after 9pm and the ceiling was already sagging. Called Prime Flow expecting a voicemail — someone answered, told me exactly which valve to close, and was at the house within the hour.
Two other plumbers wanted to lift my bathroom tiles to find a leak. Prime Flow traced it in about twenty minutes without breaking a single one. Quoted before starting and charged exactly that.
I manage a block of rentals and I've been through a lot of contractors. This is the first one where the tenants stopped phoning me to complain. On time, tidy, invoice comes through the same week.
Blocked main sewer line on a Sunday morning. Cleared it, then showed me the root that caused it and what to do about the tree. That's the bit other plumbers never bother with.
The emergency line is answered around the clock — weekends, public holidays, 2am — and it costs you nothing to get us out there. Close your main stopcock, then call.
Lines open 24 hours · 7 days · 365
We stay inside a tight radius on purpose — it's the only way to keep the 60-minute promise honest. Tap your suburb and we'll start your quote.
Just outside the list? Call anyway — if we can't get there fast enough to be useful, we'll say so.
Only as a last resort, and only in one targeted spot once we know exactly where the leak is. The whole point of detection equipment is to avoid opening up areas that turn out to be fine.
Close every tap and water-using appliance in the house, note your water meter reading, and check it again a few hours later without using any water. If the reading moved, water is escaping somewhere.
Yes. Slab leaks are one of the most common jobs we do. Acoustic equipment picks up escaping water through concrete, and pressure testing tells us which line is at fault before we go anywhere near a chisel.
Some municipalities allow a leak adjustment on your account if you can show the leak was found and repaired by a registered plumber. We provide a written report and invoice you can submit with the application.
Most residential jobs are found within a couple of hours. Larger properties, or leaks on long underground supply runs, can take longer.
There is no callout fee to come and assess it. Once we have looked at the property and the meter reading, you get a fixed price for the detection work before we start.