Why
Your Pipes Keep Leaking (And How Supa Nove Fixes It For Good)
If you’ve mopped up the same puddle under your sink more than once,
you’re not imagining it — leaks love to come back. Homeowners across
Johannesburg often tell us the same story: they fix a drip, feel
relieved for a few weeks, and then find themselves back on their knees
with a bucket and a torch. That cycle isn’t bad luck. It’s usually a
sign that the real cause of the leak was never actually addressed — only
the symptom was.
In this post, we’re going to walk through exactly what causes most
residential leaks in our area, why the “quick fix” approach so often
fails, and what a proper, lasting repair actually involves. By the end,
you should have a much better idea of what’s going on behind your walls
and under your sink — and when it’s time to stop guessing and call in a
professional.
Why Leaks Are So
Common in Johannesburg Homes
Before we get into specific causes, it helps to understand why this
is such a widespread issue locally. Johannesburg’s water is relatively
hard, meaning it carries a higher mineral content than some other
regions. Over years, this mineral buildup — often called scale —
accumulates inside pipes and around fittings. It doesn’t just reduce
water flow; it also degrades rubber seals and washers faster than you’d
expect, and it can mask small leaks by partially clogging a crack until
pressure eventually forces it back open.
Add to that the age of many Johannesburg suburbs — plenty of homes
still have plumbing that’s 30, 40, even 60 years old — and you’ve got a
recipe for recurring plumbing headaches. Older installations simply
weren’t built with today’s water pressures, appliance loads, or
materials in mind.
The Usual Suspects
1. Worn-out washers and seals
Every tap and pipe joint relies on small rubber washers to stay
watertight. Over time — especially with Joburg’s mineral-rich water —
these dry out, crack, or wear down. A dripping tap almost always traces
back to this. It sounds minor, but a single dripping tap can waste
thousands of litres of water a year, and the constant moisture around a
fitting accelerates corrosion in nearby metal components. What starts as
an annoying drip-drip-drip at 2am can, over a year or two, become a much
bigger repair.
2. Corroded pipes
Older properties, particularly those still running galvanised steel
pipework, are prone to internal corrosion. The pipe looks fine from
outside but is rusting from within, eventually wearing thin enough to
weep or burst. This is one of the trickiest issues to diagnose without
experience, because the exterior of the pipe can look completely normal
right up until the moment it fails. We often find this when a customer
calls about “a leak that came out of nowhere” — in reality, the
corrosion had been building for years.
3. High water pressure
Excess pressure stresses every joint and fitting in your system. If
several fittings in your home are leaking around the same time, pressure
is often the real culprit — not the fittings themselves. Municipal
pressure fluctuations, especially after periods of low usage overnight
when pressure builds up, can push weaker joints past their limit.
Symptoms include banging pipes (sometimes called “water hammer”), leaks
that appear simultaneously in multiple rooms, and unusually short
lifespans for taps, toilet valves, or geyser fittings.
4. Poor original installation
Loose compression fittings, unsealed threads, or the wrong pipe
sizing all lead to slow leaks that get worse with time and temperature
changes. Unfortunately, we see this a lot with DIY repairs or work done
by unqualified handymen — a fitting might hold for a few months and seem
fine, only to start weeping once thermal expansion and contraction (from
hot water use, for instance) gradually loosens the joint.
5. Tree root intrusion
For older Johannesburg suburbs with mature gardens, roots seeking
moisture can crack underground pipes, causing leaks you won’t see until
your water bill spikes or your garden gets suspiciously green in one
patch. This is particularly common with older clay or asbestos-cement
sewer and stormwater lines, which are more vulnerable to root pressure
than modern PVC. Left unaddressed, root intrusion tends to get worse
over time as the crack widens and roots grow further into the pipe.
6. Deteriorating geyser
connections
We’d be remiss not to mention geysers specifically, since they’re one
of the top sources of household leaks. The connections, pressure relief
valves, and vacuum breakers around a geyser are all potential leak
points, and geysers under pressure stress (especially older units) are
prone to slow leaks that pool quietly in a ceiling before anyone notices
a stain forming.
Why “Just Tightening It”
Doesn’t Work
A lot of leaks get “fixed” with a spanner and a prayer. The problem
comes back within weeks because the underlying cause — corrosion,
pressure, or a failed seal — was never addressed. That’s how a R200 fix
turns into a R5,000 water damage bill.
Here’s the thing about leaks: they’re rarely isolated events. A
dripping tap with a worn washer might seem like an easy fix, and
tightening it or replacing the washer often does stop the visible drip.
But if the underlying cause is excess water pressure, that same pressure
is quietly stressing every other joint in your home. Fix one leak, and
another pops up a few months later somewhere else — not because you did
a bad job, but because nobody looked at the whole picture.
This is also why so many “leak repairs” done without proper diagnosis
end up costing more in the long run. Materials get wasted, labour gets
repeated, and — worst of all — water damage can accumulate silently
behind walls or under floors while the “fix” holds just enough to hide
the ongoing problem.
The Real Cost of Ignoring a
Leak
It’s easy to underestimate a small leak. A slow drip doesn’t look
like an emergency. But consider:
- A tap dripping once per second wastes roughly 20 litres of water a
day — over 7,000 litres a year, all showing up on your water bill. - Moisture from hidden leaks is one of the leading causes of mould
growth in homes, which can affect both your health and your property
value. - Water damage to timber, drywall, and flooring compounds quickly —
what starts as a R500 repair can become a R20,000+ renovation if left
long enough. - Constant dampness accelerates corrosion in nearby metal fittings,
plumbing, and even electrical components if they’re close by, creating a
secondary safety risk.
None of this is meant to alarm you — it’s simply why we take leak
diagnosis seriously rather than treating every callout as a quick patch
job.
How We Actually Fix It
When Supa Nove comes out for a leak, we don’t just look at where the
water is showing up — we trace it back to why it’s happening in the
first place. Our process typically includes:
- Tracing the leak to its real source, not just the
visible drip. Water often travels along pipes or structural elements
before it appears, so the wet patch you see isn’t always directly above
or below the actual leak. - Testing your water pressure and adjusting it if
it’s out of range. South African plumbing regulations generally
recommend residential pressure stay within a specific safe range, and
we’ll fit a pressure-limiting valve if yours is consistently too
high. - Replacing washers, seals, or fittings with
correctly sized, quality parts — not generic ones that might not
properly match your existing fixtures. - Flagging any corroded sections before they fail
completely, so you can plan a proactive repair or replacement rather
than dealing with an emergency burst pipe. - Checking for hidden leaks in walls or under slabs
using moisture detection where needed, so we’re not guessing or
unnecessarily breaking into walls. - Reviewing your geyser and its connections as part
of any broader plumbing inspection, since geyser-related leaks are so
common and often overlooked.
We also believe in transparency about what we find. If we spot an
issue that isn’t urgent but worth keeping an eye on — like early-stage
corrosion in an old section of galvanised pipe — we’ll tell you, along
with a realistic sense of the timeline, rather than either ignoring it
or pushing an unnecessary emergency repair.
When to Call Us Before It
Gets Worse
Some signs are obvious. Others are easy to dismiss until they’re not.
Keep an eye out for:
- A tap that drips even when fully closed
- Damp patches on walls, ceilings, or under cabinets
- A water bill that’s crept up with no obvious explanation
- Low water pressure across multiple taps
- Any sign of mould or a musty smell near pipework
- Discoloured or bubbling paint on walls or ceilings
- A patch of unusually green or soggy lawn with no clear cause
- Gurgling sounds from drains or toilets that refill on their own
- Warped or soft flooring near bathrooms or kitchens
Any one of these on its own might not be an emergency. But if you’re
noticing a combination of them, or any single sign has been around for
more than a week or two, it’s worth having someone take a proper look
before it escalates.
A Few Things You Can
Check Yourself First
While we always recommend a professional inspection for anything
beyond the obvious, there are a couple of quick things worth checking
before you call:
- Check your water meter. Turn off every tap and
appliance in the house, then check if the meter is still moving. If it
is, you likely have a leak somewhere in the system even if you can’t see
it. - Inspect visible pipework under sinks. Look for
green or white crusty deposits around joints — this is often mineral
buildup from a slow, ongoing leak. - Note when the problem started. Did it coincide with
any recent work, a change in water pressure, or particularly cold
weather? This kind of detail helps us diagnose faster when we
arrive.
Final Thoughts
Leaks are one of those problems that are genuinely cheaper to fix
properly the first time. Catching a leak early — and having it diagnosed
correctly rather than just patched — is always less expensive than
repairing the water damage, structural issues, or mould that follow when
it’s left alone. If something’s dripping, pooling, or just doesn’t feel
right in your home, give Supa Nove Electrical Power & Plumbing a
call and we’ll get to the bottom of it, properly.
Supa Nove Electrical Power & Plumbing — proudly serving
Johannesburg homes and businesses.
Written by Irwin Hackner